ZigBee wireless network data safe transmission system

A safe transmission system for wireless network data comprises the following components: a network key central control end which includes a first Zigbee chip and a computer terminal interface for setting a preset unit time when the network key changes once and the parameter of alternation criterion by the user with a network key calculation program, and generating an enciphered network key to a data transmitting end in each unit of time, and at least one data receiving end. The data transmitting end comprises a second Zigbee chip, a first wifi chip and data to be transmitted, or dynamically generated image-sound data. The second Zigbee chip deciphers the enciphered network key to a plain text network key and enciphers the data to be transmitted or the image-sound data to a cipher text with the first wifi chip, and then the cipher text is transmitted to a data receiving end by the first wifi chip. The data receiving end comprises a third Zigbee chip and a second wifi chip. The third Zigbee chip deciphers the enciphered network key into the plain text network key after receiving. The second wifi chip deciphers the cipher text according to the plain text network key.