A source code and module recommendation system according to the present invention includes: a module assembly including a control module including a function unit including a topology management unit sensing and generating topology information and a plurality of other modules including a different function unit from the control module; a user terminal connected to the module assembly; and a recommendation server connected to the user terminal through a network, storing topology information of the module assembly, and providing information on a recommended source code to the user terminal based on the topology information, in which the topology information may include a connection ranking representing an order in which the plurality of other modules are connected to the control module and the recommendation server may determine the information on the recommended source code based on the connection ranking and transmit the determined information to the user terminal.