The invention discloses a system and method for timing starting of an FM radio on the basis of a mobile phone alarm. The method includes the steps that time when the alarm is started is set in advance on a mobile phone, frequency on which a radio program is available is set on the FM radio and stored, an operation instruction of a user is received, a prompt tone, indicating that the time of the alarm is up, of the FM radio is chosen, and when the time of the alarm is up, the FM radio is started through the alarm to broadcast the set radio program. According to the system and method, the FM radio is set to be the object which is started when the time of the alarm is up, and the frequency on which the radio program is available is set in advance on the FM radio. When the preset time of the alarm is up, the mobile phone automatically calls the FM radio and broadcasts the relative radio program, the radio on the corresponding frequency is timely started through the alarm, the situation that a user of the mobile phone misses the interesting radio program due to the fact that the user cannot clearly remember the time when the program is broadcast or forgets the time of the program, and great convenience is brought for the user of the mobile phone.