Paint Box is a kind of important tool for those who are interested in painting, and it could contain a lot of painting instruments. However, it is not convenient to take and move. It puts forward the analysis and solution process, excavates the real needs of the painter, and uses the final ideal solution (IFR) and the technical contradiction tool of TRIZ to analyze the technical contradictions in the use of the existing drawing tools. By applying contradiction matrix and context analogy, a preliminary conceptual plan for resolving technical contradictions is proposed. On the basis of synthesizing all the preliminary conceptual plans, a portable paint box with an easel, a paint box and a trunk is developed and designed. It can meet the needs of painting personnel for the diversity of painting tools, and can also carry and move easily, and has good application prospects.