The utility model relates to a detection apparatus for be used for automatic assembly line of examining and determine of electric energy meter, including the tray, the support sets firmly on it, the standard is checied the ware and is installed on the support, sets up at least one recess on the left side board of support, the right side board respectively, the wiring mouthful is placed in the recess, the ware was checied to the standard input output terminal with the wiring mouth links to each other. The utility model discloses can effectively solve examination unit instrument problem in proper working order whether under the operating condition that loads greatly, need not artifically to check labour saving and time saving, this device can get into the assembly line under the circumstances of not suspended assembly line, detect the examination unit of in active, and whether unit measurement function should be examined and determine to the sureness in proper working order, if can in time inform the maintainer to handle unusually, each item data of ensureing to examine and determine the link be accurate, reliable.