Abstract:With the popularity of mobile Internet and the growth of the mobile users, mobile APP has achieved rapid development in our country. However, it has become the main problem of the users finding APP that quantity overload, homogeneity. Based on the perspective of environmental psychology, and combined with information adoption model, APP discoverability model is constructed. We do the empirical research by sending questionnaires. The results show that online review quality, online review quantity, APP rating and peer influence have a significant positive influence on information usefulness, thus influence APP discoverability. This study fills the shortcomings of the research on APP discoverability. In addition, it makes recommendations to the application store and the developers for improving APP discoverability, and to promote the continuous development of the application market.