An information processing system includes user terminals; and a collaboration work assisting system for assisting a work performable by users. The collaboration work assisting system includes circuitry configured to transmit an action item candidate based on statement data of users to each user terminal. Each user terminal includes another circuitry configured to receive the action item candidate from the collaboration work assisting system; display, on a display, the received action item candidate, and a screen for receiving a registration request for registering an action item selected from the action item candidate, an execution person who will execute the action item, and a due date of the action item; receive a registration operation that requests registering of the action item, execution person, and due date; and request an action item management server, to register the action item, execution person, and due date in response to receiving the registration operation.