A task status management system, wherein tasks are carried out by a plurality of workers in a shared manner, and the work situation management system comprises a plurality of terminals and a management system, wherein the management system comprises a log Calculates plural types of index values indicating the progress status of the work based on the log information, transmits an index screen display instruction including the index value displayed on the terminal to the terminal, and the terminal displays the index screen An index screen including index values included in the display instruction is displayed and when an operation of selecting one of the index values displayed on the index screen is accepted, an index value indicating that the index value is selected The management system transmits a selection operation log to the management system, the management system updates the overall effectiveness evaluation value of the index corresponding to the index value selected by the selection based on the index value selection operation log received from the plurality of terminals, Total updated Based on efficacy evaluation value, and changes the index displayed on the index screen of the plurality of terminals.
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