The invention relates to a television set remote control system and method based on a WeChat app at a mobile terminal. The method includes the following steps: 1. A mobile terminal user scanning a 2D code at a television set terminal by using WeChat in order to bond the mobile terminal and a television set terminal, saving the bonding information as a bonding relation table of a database of a backend server; 2. A mobile terminal user inputting information and transmitting the information to the backend server; 3. The backend server verifying the presence of the bonding relation through the bonding relation table of the database; 4. If the bonding relation exists, the backend server converts the information to a command and saves the command to the backend server; and 5. The television set terminal acquiring the command from the backend server and implementing the operation. Compared with prior art, according to the invention, the method and the system have the advantages of long remote control distance, control at any time and any places, and improved user experience.