The invention discloses a remote brake diagnosis method. When a pedal is used by a user, the position of the pedal and motor pulses of an electric automobile are monitored in real time, time and pulse in the beginning time and time and pulse when the pedal is in a strong braking point are recorded, the speed change rate of a motor is calculated and transmitted to a server for clustering analysis, a model of the change rate of the braking speed is established, and whether function of a brake is normal is determined by analyzing the load, the driving gradient and the speed change rate of the electric automobile in the braking process. Thus, the method can be used to discover whether the function of the brake is normal timely, and reduce workload of maintenance staff.