Based on the FBM behavior model,this paper explores how learning apps can better help users to carry out learning behaviors,summarizes the corresponding design strategies of learning apps,and puts forward theoretical basis for the construction of learning apps. Based on FBM behavior model,this paper analyzes the characteristics of users' learning behaviors through the research method of user journey graph,and insights into users' pain points and needs. Starting from three dimensions of motivation,users' ability and the triggering mechanism of learning behaviors,this paper proposes design strategies for building learning apps to provide references for relevant designers.