In an authoring system, a user creates and edits a scenario for a robot by using a GUI screen and a mouse. An authoring tool converts the scenario into a mnemonic code called "RCODE". When an RCODE action-control program is debugged, the RCODE program is extracted and encrypted step by step. The encrypted program is sequentially transferred to the robot by means of radio communication. The interpreter of the robot performs debugging by sequentially interpreting and executing the transferred program.