The invention discloses a billing method, comprising: a service / software provider issues service items to a device management server; a device terminal accepts services according to the service items, and the device management server collects operation information and user information according to service operation results; device management The server sends the service item, operation information and user information to the billing server; the billing server performs billing according to the service item, operation information and user information. According to the present invention, by recording the operation information and extracting the operation results through the equipment management server, the specific operation of each service and different service items can be distinguished, so that billing can be performed according to specific conditions, making the billing methods flexible and diverse, and better satisfying Billing requirements of different service providers. In addition, for a wide variety of service types, billing information can be collected accurately to ensure the accuracy of billing.