China is a big country in the distribution of endangered animals. In today's society, more and more attention is paid to the protection of endangered animals. This APP is designed and developed based on Unity engine and mainly runs on Android mobile terminals. Users enter different experience levels by selecting different animal characters. Through the dialogue mechanism, small games, animation and other experiences, the simulation of the psychological activities of animals, so that users experience the survival dilemma of endangered animals, learn more about the protection of endangered animals, and obtain the protection badge after completing the experience. The protection of endangered animals experience APP is divided into three functional modules, namely AR functional module, experience functional module and protection badge wall module (knowledge question and answer). 1.AR module: by scanning the patterns on the brochure of endangered animals, preview animal models, understand the endangered situation and introduction of endangered animals in China. 2. Experience module: users can experience the survival dilemma of endangered animals by selecting giant panda, golden monkey, baiji, south China tiger and crested ibis to enter different levels, and through the dialogue mechanism of Unity engine, small games and other experiences, simulation of animals' psychological activities, etc., users can experience the survival dilemma of endangered animals, and obtain protection badges after completing the experience. 3. Protection badge wall: use knowledge questions and answers and other links to understand the knowledge of various methods and measures taken by China to protect endangered animals. After answering the question, the protection certificate is generated according to the score, and you can click to save it to the mobile phone album. APP theme using close to the cartoon comic style. The background uses green, blue and other close to natural colors to use PhotoShop for pictures and other design. Use UGUI and GUI in Unity for UI design.