The embodiments of the present disclosure disclose technical solutions for a method and apparatus for personal-network merging and splitting, wherein the method for personal-network merging includes that: a user, a server, a service, a personal network device, a personal network gateway or a particular event triggers a personal-network merging; a new personal network gateway is selected for a merged personal network; a personal network device is enrolled in the merged personal network; and the merged personal network is registered on a personal network server. The method for personal-network splitting includes that: a user, a server, a service, a personal network device, a personal network gateway or a particular event triggers a personal-network splitting; a new personal network gateway is selected for a personal network after the splitting; personal network devices are enrolled in personal networks after the splitting respectively; and the personal networks after the splitting are registered on a personal network server. With the method and apparatus of the present disclosure, the problem of personal area network (PN) merging and splitting and in particular merging and splitting of multiple personal networks in a PN can be solved effectively when there are a large number of PNs.