1. An apparatus for executing a robot task, the apparatus comprising: a storage unit to store at least one robot model, at least one robot behavior, and at least one robot task; and a task execution unit to generate at least one execution object from the stored at least one robot model, at least one robot behavior, and at least one robot task, and to execute a task of a robot from a corresponding execution object among the generated at least one execution object in response to an execution command input from a user.