Time is progressing, modern art is also booming, painting is not only focusing on beauty but a way of communication, painting can convey the emotions we want to express, which cannot be replaced by language. A good painting can integrate the creator's emotion with the painting, and reflect the performance of artistic thinking, so that the painting becomes lifelike, more vivid and natural as if reading the author's heart, as if communicating with the author, the form of language is the basis to support all the paintings. Watercolor painting has a long history, from the West into the land of China, by the influence of oriental art, formed a unique contemporary watercolor language form, showing a unique painting style. Emotion is the core of formal language as the creation of painting, and it is the bridge between emotion and concrete expression, and the two are complementary to each other.