1. A support system comprising: a mechanism designing section for three-dimensionally designing a mechanism composed of a plurality of parts including an actuator and a sensor; a three-dimensional-mechanism model simulating section, in which the mechanism is structured as a three-dimensional-mechanism model, for simulating an operation of the mechanism; an embedded software developing section for developing a control program, which is embedded in the mechanism to control the operation of the mechanism, as embedded software; a first interface section for inputting designing data, which is created in said mechanism designing section as the result of the designing by said mechanism designing section, from said mechanism designing section to said three-dimensional-mechanism model simulating section to be reflected on the three-dimensional-mechanism model; and a second interface section for transferring data between said three-dimensional-mechanism model simulating section and said embedded software developing section while synchronizing said three-dimensional-mechanism model simulating section and said embedded software developing section in operation with each other.