年轻时在上海钱庄当学徒时喜画花鸟画，学习任颐，并受到吴昌硕的指导，画艺提高很快。1919年到北京任司法部录事；1919～1924年间，由陈师曾推荐任北京美术专门学校（北平艺术专科学校）中国画系主任、教授。他的得意弟子为王雪涛、王羽仪。少为钱庄学徒，因学画任颐花鸟画，为吴昌硕所赏。后至北京，陈师曾劝其改学李，华嵒，艺事大进，并被陈推荐为北京美专教授。善花卉翎毛，喜写生，尤擅画猴。1929年曾赴日本，举办个人画展。后在天津，穷困潦倒而死。

1919～1924年间，由陈师曾推荐任北京美术专门学校（北平艺术专科学校）中国画系主任、教授。他的得意弟子为王雪涛、王羽仪。1929年4月初，王梦白应邀赴日本介绍中国艺术，在东京、大阪两地曾举办个人画展，受到日本艺术家和鉴藏家的好评，出版了《王梦白画册》。王梦白晚年寓居天津，贫穷潦倒，病不治身亡。
王梦白在北京有机会博览和临摹宋元明清绘画真迹，其中以沈周、陈淳、徐渭、林良等明代诸家作品最为他所喜爱。他在广泛吸收的基础上，加以变化，独创一格。他画花卉翎毛，亦长于山水、人物，尤长于动物，经常到动物园观察写生和观看动物影片。所画猴子千姿百态，生动有趣，不落俗套。王梦白还以书法见长，并能诗，题画常有佳句。

1946年春，张大千和王雪涛在一起赏画论道、怀古说今。不知不觉，话题涉及到王雪涛的老师王梦白。王雪涛以王梦白的《红树双猿图》索题，张大千慨然题到：“远寻红树宿，深向白云啼。丙戌春孟，雪涛道兄出观。王梦白先生之殁，忽忽十二年矣。题此不胜车过之痛。爰。”落款的下方，工整地留下了两方印章，一为“张爰之印”，另为“大千”。
《红树双猿图》的作者王梦白，祖籍江西丰城，1888年生于浙江衢州，1934年病逝于天津。尽管他的人生历程，跟老家江西的关系不甚密切，在社会交往中他却始终未忘江西乡籍。据说他的名片上写着：“江西老，王云，字梦白，号破斋主人。”他的知交好友陈衡恪比他年长12岁，两人的交往既有志同道合之意，亦有乡邻桑梓之谊。王梦白早年在上海谋生，曾经在灯笼店、钱庄作学徒，业余刻苦习画。宗任伯年，并得到吴昌硕的亲自指导。民国初年，王梦白持吴昌硕代定之笔单前往北京谋职，在司法部担任录事。1915年，在司法部任职的余绍宋与司法部的若干同事一起组织“宣南画社”，请江南名画家汤定之作指导，每次聚会都邀请在北京的书画名流光临切磋，梁启超、姚华、陈衡恪、萧俊贤、王梦白等，都是雅集的常客。1920年，在陈衡恪的推荐下，32岁的王梦白担任北平艺术专科学校中国画系教授，开始了人生最辉煌的阶段。
王梦白擅长花鸟猿禽，得意之作均出自观察写生，并且能够不受传统笔法的束缚。
 王雪涛曾经回忆说，王梦白作画时并不死守某种笔法，而是“转运自如”、“根据表现内容与作者之意，该用什么笔法就用什么笔法”。王雪涛称王梦白作画有“三快”，即眼快、手快、心快。王梦白的代表之作，比如现藏于中国美术馆的《豆荚蚂蚱图》、《海棠蟋蟀图》等，蚂蚱、蟋蟀的瞬间动态描绘得活灵活现，让人感受到“当其下手风雨快，笔所未到气已吞”的精熟畅快。其实，在王梦白的绘画创作中，“眼快”和“手快”都只是表面现象，“心快”才是真正的诀窍。王梦白善于观察，有着惊人的默写能力。他在动物园写生，常常是眯起一只眼，静静地看个够，然后转身背临，尽得神韵。也正是有这样的素质，他在放笔落墨的时候，没有一点雕琢之气，并且能够笔随心运，涉笔成趣。他还常常带着王雪涛一起观看动物题材的影片，情酣兴浓之时，就紧紧地抓住王雪涛的手，叮嘱他格外留意。
王梦白的画，在后期受徐青藤、华新罗、李复堂等人的影响较大。有些作品中，也有着陈衡恪的影子。比如王梦白的《菊花螃蟹》，现藏于中国美术馆，其笔法和趣味，跟陈衡恪的同类作品《蟹菊图》、《菊轴》、《菊石图》、《松菊图》等，有着异曲同工之妙。1915年，梅兰芳曾经向王梦白学习绘画。每星期一、三、五，王梦白亲往梅宅，现场示范作画技巧。1924年，梅兰芳的30岁生日，王梦白与凌植支、姚华、陈衡恪、齐白石等一起在梅宅合作绘画，王梦白画了一只张嘴的八哥，栩栩如生。此画是梅兰芳最珍爱的绘画作品，张挂于梅家的书房。
1929年4月初，王梦白应邀赴日本介绍中国艺术，在东京、大阪两地曾举办个人画展，受到日本艺术家和鉴藏家的好评，出版了《王梦白画册》。
王梦白先生从美术史的角度上说，有突出的位置。在民国时期他跟齐白石、陈师曾、吴昌硕等等是这个在一个等级线上。王梦白画画很全面，花卉草虫是最擅长的，山水人物画得都很精彩。他还以书法见长，能诗作对，题画常有佳句。由好友陈师曾推荐，任北京美术专科学校国画系主任。40岁以后，王梦白寓居天津，贫穷潦倒，46岁辞世。因此，王梦白创作的书画数量很少，只有一小部分人收藏他的书画作品。

A young man in Shanghai qianzhuangs as an apprentice like painting painting, learning Ren Yi, and are subject to the guidance of Wu Changshuo, art improves very quickly. 1919 was appointed to the Beijing Department of justice clerk; 1919 ~ 1924 years, recommended by Chen Shiceng at the Beijing art school (Beiping art school) professor and director of Chinese painting department. His proud disciples are Wang Xuetao and Wang Yuyi. Less for banks because of the apprentice, Ren Yi painting flower and bird painting, the reward for Wu Changshuo. After the change to Beijing, Chen Shiceng, Xue Li, Hua Yan, French into a large, and is recommended for the Beijing Academy of fine arts professor chen. Good flowers and feathers, like painting, especially good at painting monkey. 1929 went to Japan, held an exhibition. Later in Tianjin, died in the gutter.
1919 ~ 1924 years, recommended by Chen Shiceng at the Beijing art school (Beiping art school) professor and director of Chinese painting department. His proud disciples are Wang Xuetao and Wang Yuyi. At the beginning of April 1929, Wang Mengbai was invited to Japan to introduce China art in Tokyo and Osaka have held personal exhibitions by Japanese artists and collectors in the praise, published the "Wang Mengbai book". Wang Mengbai old age resident in Tianjin, poor, sick and died.
Wang Mengbai in Beijing have the opportunity of exposition and copying of Ming and Qing Dynasties painting artworks, in which Shen Zhou, Chen Chun, Xu Wei and Lin Liang in the Ming Dynasty from the works of the most beloved. He changes based on extensive absorption, originality. He is also good at painting flowers birds, landscapes, figures, especially good at animal, often go to the zoo and watch the movie animal observation sketch. The monkey paintings are vivid and interesting, conform to no conventional pattern in different poses and with different expressions. Wang Mengbai also with calligraphy and painting to poetry, and often quotes.

The spring of 1946, Zhang Daqian and Wang Xuetao together to appreciate a painting on the road, said this nostalgia. Unconsciously, the topic involves Wang Xuetao's teacher, Wang Mengbai. Wang Xuetao Wang Mengbai's "double cable map" ape mangrove, Zhang Daqian generously to: "far in search of mangrove places, deep into the clouds. Bingxu Meng Chun, a friend Xuetao view. Mr. Wang Mengbai died, and now twelve years. This is too much pain. Yuan." Inscribed below, neatly left two seals, one for the "Zhang Yuanzhi India", the other is "daqian".
"Map" of the two mangrove ape author Wang Mengbai, a native of Jiangxi Fengcheng, was born in 1888 in Zhejiang, Quzhou, died in Tianjin on 1934. Although his life course, with his hometown of Jiangxi is not very close relationship, but he has never forgotten in social contacts Jiangxi township. It is said that his business card reads: "Jiangxi old, Wang Yun, the word dream white, no.." His longtime friend Chen Hengke older than he was 12 years old, two people are like-minded, there are neighbors, homeland of friendship. Wang Mengbai early to make a living in Shanghai, once an apprentice in the lantern shops, banks, amateur hard painting. Zong Ren, and received the personal guidance of Wu Changshuo. In the early Republic of China, Wang Mengbai Wu Changshuo decided to go to Beijing on behalf of a single job, as a clerk in the Department of justice. In 1915, Yu Shaosong and several colleagues of the Ministry of justice ministry organized together with the "southern" Jiangnan ", please artist Tang Dingzhi as a guide, every party in Beijing to invite celebrity calligraphy and painting skills, Liang Qichao, Yao Hua, Chen Hengke, Xiao Junxian, Wang Mengbai etc., are gathering regulars. In 1920, Chen Hengke's recommendation, the 32 year old Wang Mengbai served as professor of painting China Beiping art school, began the most glorious stage of life.
Wang Mengbai is good at flower and bird bird ape from observing and sketching, favourite work, and can not fettered by traditional brushwork.
Wang Xuetao once recalled, Wang Mengbai paints are not keep some strokes, but "transport freely", "according to the performance of the content and meaning of the author, what style is what style of writing". Wang Xuetao King dream "three white paint fast, namely eye shoukuai, fast heart. Wang Mengbai's representative works, for example, is now in the possession of Chinese Gallery "map", "Begonia pod grasshopper cricket map", the instant dynamic grasshoppers, crickets portrayed vivid, make people feel when the wind and rain the fast start, the pen not to swallow the gas has "mastery of fun. In fact, in Wang Mengbai's painting, "the eye" and "hand" are only superficial, "heart" is the real trick. Wang Mengbai is good at observation, has an amazing ability to write. He sketches in the zoo, often narrowed eyes, quietly look at enough, and then turned back to do, to charm. It is also such a quality, when he put pen ink, not a little artificial gas, and pen at the transport level. He often took Wang Xuetao to watch the animal theme of the movie, the thick feeling intoxicated when he grasped Wang Xuetao's hand and told him to pay special attention to.
Wang Mengbai's paintings, in the late by the influence of Xu Qingteng, Hua Xinluo, Li Futang, etc.. Some works, there are also the shadow of Chen Hengke. For example, Wang Mengbai's "chrysanthemum crab", is now in the possession of Chinese Art Museum, the style and taste, with Chen Hengke's similar works "crab" Chrysanthemum Chrysanthemum map ", and" axis "map", "ammonite pine map", with the different approaches but equally satisfactory results. 1915, Mei Lanfang had to learn painting to Wang Mengbai. Every Monday, three, five, Wang Mengbai personally Mei house, demonstration of painting techniques. In 1924, Mei Lanfang's 30 birthday, Wang Mengbai and Yao Hua, Chen Hengke, Ling Zhi and Qi Baishi together in the Mei Zhai cooperation painting, Wang Mengbai draw a mouth of starlings, true to life. This is Mei Lanfang's most precious paintings hung on the plum home study.
At the beginning of April 1929, Wang Mengbai was invited to Japan to introduce China art in Tokyo and Osaka have held personal exhibitions by Japanese artists and collectors in the praise, published the "Wang Mengbai book".
Mr. Wang Mengbai said from the perspective of art history, there are prominent position. In the Republic of China he and Qi Baishi, Chen Shiceng, and so on is this on a level line of. Wang Mengbai painting is very comprehensive, insects and flowers are the best at that landscape painting is very wonderful. He also known poems on calligraphy, painting can, often quotes. Recommended by good friend Chen Shiceng, Ren Beijing Art College Chinese Painting Department director. 40 years later, Wang Mengbai lived in Tianjin, impoverished, passed away at the age of 46. Therefore, Wang Mengbai created a small number of paintings, only a small number of people to collect his paintings.