A method of information sharing comprising: at a server of a social network platform having one or more processors and memory storing programs executed by the one or more processors, receiving a first device identifier associated with a first health monitoring device from a first user terminal, the first user terminal configured to communicate with the first health monitoring device to receive health monitoring information of a respective monitored subject of the first health monitoring device; establishing a corresponding relationship between the first device identifier and a first user ID of the social networking platform, wherein the first user ID corresponds to a first user associated with the first user terminal; identifying at least one second user ID from a plurality of social network contacts of the first user ID based on the first device identifier, wherein each of the at least one second user ID is associated with a respective second device identifier for a respective second health monitoring device that provides health monitoring information of a respective monitored subject of the respective second health monitoring device; and forming a respective social network group including the first user ID and the at least one second user ID for sharing the health monitoring information received from the first health monitoring device and the respective second health monitoring device of the at least one second user ID; characterized in that identifying the at least one second user ID based on the first device identifier further comprises: determining a respective device type for the first health monitoring device based on the first device identifier; for each of the plurality of social network contacts of the first user ID: determining whether the social network contact is associated with a respective device identifier for a device of the respective device type; and in accordance with a determination that the social network contact and the first user ID are both associated with the respective device identifiers of the same device type, including the social network contact as one of the at least one second user ID. at a server of a social network platform having one or more processors and memory storing programs executed by the one or more processors, receiving a first device identifier associated with a first health monitoring device from a first user terminal, the first user terminal configured to communicate with the first health monitoring device to receive health monitoring information of a respective monitored subject of the first health monitoring device; establishing a corresponding relationship between the first device identifier and a first user ID of the social networking platform, wherein the first user ID corresponds to a first user associated with the first user terminal; identifying at least one second user ID from a plurality of social network contacts of the first user ID based on the first device identifier, wherein each of the at least one second user ID is associated with a respective second device identifier for a respective second health monitoring device that provides health monitoring information of a respective monitored subject of the respective second health monitoring device; and forming a respective social network group including the first user ID and the at least one second user ID for sharing the health monitoring information received from the first health monitoring device and the respective second health monitoring device of the at least one second user ID; characterized in that identifying the at least one second user ID based on the first device identifier further comprises: determining a respective device type for the first health monitoring device based on the first device identifier; for each of the plurality of social network contacts of the first user ID: determining whether the social network contact is associated with a respective device identifier for a device of the respective device type; and in accordance with a determination that the social network contact and the first user ID are both associated with the respective device identifiers of the same device type, including the social network contact as one of the at least one second user ID. determining a respective device type for the first health monitoring device based on the first device identifier; for each of the plurality of social network contacts of the first user ID: determining whether the social network contact is associated with a respective device identifier for a device of the respective device type; and in accordance with a determination that the social network contact and the first user ID are both associated with the respective device identifiers of the same device type, including the social network contact as one of the at least one second user ID. determining whether the social network contact is associated with a respective device identifier for a device of the respective device type; and in accordance with a determination that the social network contact and the first user ID are both associated with the respective device identifiers of the same device type, including the social network contact as one of the at least one second user ID.