Abstract: A library presenting device, a library presenting method, and a robot control system for presenting a library suitable for a target object. The library presenting device (10) includes an input information acquisition unit (131) that acquires input information including the target object; a result acquisition unit (132) capable of acquiring a result of applying a defined task with respect to the target object, using libraries capable of executing tasks with respect to the target object; an evaluation acquisition unit (133) that acquires an evaluation of the result of applying the defined task; and a presentation content determination unit (134) that determines, based on the evaluation of the result of applying the defined task using a first library among the libraries, output of a result of applying the defined task using a second library among the libraries that is different from the first library.