An RPC conversion processing system that performs relaying between a first application and second application of different protocols, the RPC conversion processing system comprising: a first interface provider connected to the first application and configured to provide a first interface for the first application; an RPC conversion relay function section; and a second interface provider connected to the second application and configured to provide a second interface for the second application, a storage configured to store common data structure generation source information which is common information based on which setting information is generated in the first interface provider, the second interface provider, and the RPC conversion relay function section; a first setting information generator configured to generate first setting information to be provided to the first interface provider and the RPC conversion relay function section, based on the common data structure generation source information; and a second setting information generator configured to generate second setting information to be provided to the second interface provider and the RPC conversion relay function section, based on the first setting information, wherein the first interface provider receives a request for processing an RPC from the first application, and the RPC conversion relay function section converts the RPC into an RPC of the second application and outputs the RPC of the second application to the second interface provider, thereby relaying an RPC between the first application and the second application, wherein the first interface provider, the RPC conversion relay function section, and the second interface provider are included in the same container or virtual machine. a first interface provider connected to the first application and configured to provide a first interface for the first application; an RPC conversion relay function section; and a second interface provider connected to the second application and configured to provide a second interface for the second application, a storage configured to store common data structure generation source information which is common information based on which setting information is generated in the first interface provider, the second interface provider, and the RPC conversion relay function section; a first setting information generator configured to generate first setting information to be provided to the first interface provider and the RPC conversion relay function section, based on the common data structure generation source information; and a second setting information generator configured to generate second setting information to be provided to the second interface provider and the RPC conversion relay function section, based on the first setting information, wherein the first interface provider receives a request for processing an RPC from the first application, and the RPC conversion relay function section converts the RPC into an RPC of the second application and outputs the RPC of the second application to the second interface provider, thereby relaying an RPC between the first application and the second application, wherein the first interface provider, the RPC conversion relay function section, and the second interface provider are included in the same container or virtual machine.