According to an aspect of the present invention, there is provided with a work assisting method, including: providing an information storage which stores a plurality of process maps that define constraint on order of carrying out tasks in a work process, task check information that represent check items for the tasks in each process map, and task time information that represent required times for the tasks in each process map; inputting execution instruction information that instructs execution of a work; detecting a process map that matches to a work indicated in the execution instruction information; collecting check information that is necessary for checking check items associated with tasks in detected process map; checking the check items to detect a task error; and notifying information that represents content of detected task error.