In a distributed processing in which multiple operation transportation methods can be used, a method is proposed which efficiently selects an operation transportation method in accordance with conditions of the distributed system. In view of this, a first computer is provided which includes: a first operation transportation portion which conducts multiple transportation methods that transports, for example, processes to a computer to execute them; a second operation transportation portion; and a selection information storing portion storing information used for selection from the multiple transportation methods. Further, a second computer is provided which includes a first operation receiving portion that conducts operations in accordance with the multiple transportation methods. The first computer includes a transportation request portion which detects information from the selection information storing portion for selecting a transportation method that is operable for the second computer and which selects the first operation transportation portion based on the detection result, and the first operation transportation portion selected by the transportation request portion transports, for example, a process to the first operation receiving portion of the second computer.