The utility model provides a waste heat recovery utilizes generating set of system to detect and uses load box, includes a container, installs the first load module of mutually independent, second load module and the third load module that can work respectively or move jointly in this container, waste heat recovery utilize steam turbine generator set, power turbine generating set and organic working medium generating set of system pass through the contactor realize with being connected of the various combination of this first load module, second load module and third load module, reach the increase and decrease of the load in first load module, second load module and the third load module, it is right in order to satisfy steam turbine generator set, power turbine generating set and organicworking medium generating set's output's measurement and energy consumption's needs. The utility model discloses the effectual area that has reduced has increased the flexibility of using, can realize test and energy consumption to steam turbine generator set, power turbine generating set and organic working medium generating set's generated energy respectively.