To provide a system and a method for supporting development with which the action of equipment corresponding to a control instruction can be easily comprehended and the operation of an equipment control program can be easily confirmed.

A virtual equipment 10 is used for outputting an output signal by performing the same action as real equipment corresponding to an input signal and for outputting information for three-dimensionally displaying that action. Based on the information outputted from the virtual equipment 10, a simulation executing means 32 performs display processing for the three- dimensional form of virtual equipment, list processing for the control instruction related to the virtual equipment, explaining processing for the control instruction and action display processing for three-dimensionally expressing the action of virtual equipment based on the control instruction inputted from an input means 21 and displays the action of virtual equipment 10 on a simulated result confirming means 50.