Abstract: Disclosed is a system for operating investment money (IM). The disclosed IM operating system includes a computation module communicating with a client information processor and receiving client setup information input/set by a client, a computation module generating an IM operation simulation data and notifying the generated IM operation simulation data to the client information processor, and a computation module, in response to a client approval data for the IM operation simulation data, transmitting the IM operation simulation data to an IM management server so as to allow the client to be paid the expected cash output at each turn and the expected cash output at the last turn at t each turn and at the last turn, respectively.