The present invention discloses a method for implementing device grouping and interactions between grouped devices. In a network, a device creating a device group sends an advertisement message carrying identification information of a device group to which it belongs, to the network. After receiving the advertisement message, a network device which wants to join in the corresponding device group joins in the device group identified by the corresponding advertisement message. When two network devices interact with each other, the method further comprises: sending by an initiating device, an access request to an accessed device; judging by the device receiving the access request, whether the device sending the request is a trusted device thereof or not, if so, interacting by both parties with each other; otherwise, denying the access request, or determining a common trusted third party together with the initiating device; acquiring by the initiating device, key information of the accessed device from the common trusted third party, and interacting with the accessed device by using the acquired key information. The method can support one and the same device to join in deferent groups while facilitating the device management, and can achieve secure authentication based communication interactions between any devices.