WORK MANAGEMENT SYSTEM

Provided is a construction management system capable of easily keeping track of the work statuses of a plurality of work machines and carriers operating in a construction site, and identifying, irrespective of target values, elements of work, carriers and the like having relatively low work efficiency, thereby improving work efficiency. The present invention provides a server device for generating and outputting work management information for managing a work status of at least one carrier. The server device comprises a storage device for storing a program for generating work management information, and a controller for reading the program from the storage device and generating work management information by executing the program. The controller performs: a process of acquiring position information about at least one carrier; a process of generating, based on the position information, work type information indicating whether the carrier is performing a predetermined work or moving; a process of calculating a required time for each work type information item of the carrier; a process of comparing the required time for each work type information item and extracting a work element with low work efficiency based on a first rule concerning required time; and a process of outputting the extracted work element with low work efficiency (see Fig. 18).