The invention discloses a wireless network stability optimization method and system capable of guaranteeing a power communication network to stably operate. The wireless network stability optimization method comprises the steps that: a base station determines primary and standby core network equipment according to aforehand configuration, and fixedly allocates a user terminal to one piece of primary core network equipment; when the base station detects that one piece of primary core network equipment has a fault, the base station can detect that a link state between base station equipment and the primary core network equipment is abnormal, and initiates release for a communication module attached to the primary core network equipment; and the released communication module initiates attachment again, and the base station connects the communication module onto the standby core network equipment. The wireless network stability optimization system comprises the core network equipment, access equipment and a base station backup power supply; the core network equipment comprises the primary core network equipment and the standby core network equipment; and networking is carried out on the primary core network equipment and the standby core network equipment and a primary station server by the same switch in a fully connected mode.