The invention discloses a method and a system for searching a node, belonging to the field of communication of Internet of things. The method comprises the following steps that a client sends a search request which carries the search range and the position appointed by a user; a proxy node receives the search request and broadcasts the search request to the neighbor node of the proxy node, wherein the search request carries the coding, the message information, the position and the search range of the proxy node; the neighbor node receives the search request and judges whether the research request is received or not; if the research request is not received, the neighbor node judges whether the neighbor node per se is located within the search range or not according to the position and the search range; if the research request is received, a response message which carries the message time and the coding and the position of the neighbor node is sent to the proxy node, and the the search request is broadcasted to the neighbor node; the proxy node receives the respond message and sends the respond message to the client. The invention can accurately searches the nodes.