POS terminal and method, system and service platform for activating same

The invention provides a POS terminal and a method, system and service platform for activating the POS terminal. The method includes the steps that the POS terminal sends a device serial number to the service platform, and after receiving the device serial number of the POS terminal, the service platform obtains commercial tenant information from a commercial tenant managing system according to the device serial number; after the commercial tenant information is obtained successfully, a master key of the POS terminal is obtained from a key managing system, and a terminal private key certificate is obtained from a certificate managing system; the obtained information is returned to the POS terminal; the information is used for completing activating operation for the POS terminal. By the adoption of the technical scheme, time and cost of installation personnel can be greatly reduced, the installation personnel even do not need to visit a commercial tenant and directly issue a device to the commercial tenant after the commercial tenant passes audits, the commercial tenant can complete terminal configuration operation by himself after getting the device, and the method is simple, rapid and suitable for large-scale device installation in batch.