A communication control method for a communication system including a first node and a node changing device comprising a sequence monitoring unit and a changing means (14,15) comprising a placement calculation unit and a placement instruction unit, the method comprising the following steps: the first node communicating with a communication terminal and executing request processing from the communication terminal, the first node being an edge node connected to a Regional Area Network, RAN, linked to a wireless base station, eNodeB, and having an edge application for executing request processing from the communication terminal; and the sequence monitoring unit receiving from a Mobility Management Entity, MME, of the communication system as a result of a monitoring request regarding handover a monitoring result regarding handover comprising information regarding a handover of the communication terminal, wherein the information regarding the handover of the communication terminal contains information indicating the occurrence of handover, a user ID indicating the communication terminal that has moved, and IDs of the wireless base station destination nodes, eNodeB, (40B, 40C) based on the destination of the communication terminal, the sequence monitoring unit sending the monitoring result to a placement calculation unit; wherein the placement calculation unit receives the monitoring result and determines to change the first node to one of the destination edge nodes (40B, 40C) linked to the handover eNodeB destination node (80B, 80C) of the communication terminal located in a specified range from the eNodeB node linked to the first node, when the monitoring result satisfies the conditions to change a device for execution based on a service policy indicating conditions for changing an edge node for execution an execution location management table that contains information about a location to execute processing, and an edge installation location correspondence table that contains information indicating an edge node corresponding to the eNodeB destination node, and sends the destination edge node to the placement instruction unit; and wherein the placement instruction unit receives the destination edge node from the placement calculation unit and gives a Management & Orchestration, MANO, of the communication system a placement change instruction to this node to activate said one of the destination edge nodes (40B, 40C) to become ready to receive a request from the communication terminal and to execute request processing after the change to said one of the destination nodes (40B, 40C). the first node communicating with a communication terminal and executing request processing from the communication terminal, the first node being an edge node connected to a Regional Area Network, RAN, linked to a wireless base station, eNodeB, and having an edge application for executing request processing from the communication terminal; and the sequence monitoring unit receiving from a Mobility Management Entity, MME, of the communication system as a result of a monitoring request regarding handover a monitoring result regarding handover comprising information regarding a handover of the communication terminal, wherein the information regarding the handover of the communication terminal contains information indicating the occurrence of handover, a user ID indicating the communication terminal that has moved, and IDs of the wireless base station destination nodes, eNodeB, (40B, 40C) based on the destination of the communication terminal, the sequence monitoring unit sending the monitoring result to a placement calculation unit; wherein the placement calculation unit receives the monitoring result and determines to change the first node to one of the destination edge nodes (40B, 40C) linked to the handover eNodeB destination node (80B, 80C) of the communication terminal located in a specified range from the eNodeB node linked to the first node, when the monitoring result satisfies the conditions to change a device for execution based on a service policy indicating conditions for changing an edge node for execution an execution location management table that contains information about a location to execute processing, and an edge installation location correspondence table that contains information indicating an edge node corresponding to the eNodeB destination node, and sends the destination edge node to the placement instruction unit; and wherein the placement instruction unit receives the destination edge node from the placement calculation unit and gives a Management & Orchestration, MANO, of the communication system a placement change instruction to this node to activate said one of the destination edge nodes (40B, 40C) to become ready to receive a request from the communication terminal and to execute request processing after the change to said one of the destination nodes (40B, 40C).