Disclosed is a method for repairing a fault of a terminal which includes: acquiring, by a terminal, an error log according to fault repairing instructions, and extracting identification information of a corresponding application from the error log; when the application is a local application, according to the identification information of the local application and a preset top level domain name corresponding to an after sales server of the local application, determining an IP address of the after sales server corresponding to the local application; sending the error log to the corresponding after sales server according to a preset receiving port and the IP address of the after sales server; determining, by the after sales server, a solution according to the error log, and feeding back the solution to the terminal; and performing, by the terminal, operation of repairing the fault of the terminal according to the solution. Also disclosed is a system for repairing a fault of a terminal. According to the method and system provided in the present disclosure, the error log of the terminal can be acquired quickly and accurately, repairing the fault is achieved, the occurrence of returning to the factory for repairing is suppressed completely, and economic cost and time for repairing the fault is reduced.