In view of facial expression recognition technology, the advantages of self-repair network (Self-Cure Network, SCN) fa‐ cial expression recognition algorithm model are used to realize the application of SCN on mobile terminal devices, using the trained model to build facial expression recognition system, and develop a wechat small program as the system platform．After the system test, the results show that the system has high expression recognition accuracy, convenient operation, smooth operation and complete functions．The SCN face expression recognition system based on wechat small program has a wide range of application prospects．