An information processing system comprising: a plurality of user terminals; and a collaboration work assistance system (10, 11) for supporting a collaboration work performable by a plurality of users who operate the respective user terminals, the collaboration work assistance system (10, 11) including: a detection unit configured to detect an action item candidate from voice-text data converted from recorded video data or recorded audio data, and replay information of the recorded video data or recorded audio data corresponding to the action item candidate, by performing morphological analysis processing on each sentence of the voice-text data converted from the recorded video data or recorded audio data, and detecting a particular action item of one sentence including a combination of at least two elements from three elements probably indicating a content of the particular action item, a particular execution person of executing the particular action item, and a particular due date of the particular action item as the action item candidate; and a transmission/reception unit configured to transmit, to each of the user terminals, the action item candidate, and the replay information of the recorded video data or recorded audio data corresponding to the action item candidate, each user terminal including: a reception unit configured to receive the action item candidate and the replay information from the collaboration work assistance system (10, 11); and a display control unit configured to display the received action item candidate and the replay information on a display. a plurality of user terminals; and a collaboration work assistance system (10, 11) for supporting a collaboration work performable by a plurality of users who operate the respective user terminals, the collaboration work assistance system (10, 11) including: a detection unit configured to detect an action item candidate from voice-text data converted from recorded video data or recorded audio data, and replay information of the recorded video data or recorded audio data corresponding to the action item candidate, by performing morphological analysis processing on each sentence of the voice-text data converted from the recorded video data or recorded audio data, and detecting a particular action item of one sentence including a combination of at least two elements from three elements probably indicating a content of the particular action item, a particular execution person of executing the particular action item, and a particular due date of the particular action item as the action item candidate; and a transmission/reception unit configured to transmit, to each of the user terminals, the action item candidate, and the replay information of the recorded video data or recorded audio data corresponding to the action item candidate, each user terminal including: a reception unit configured to receive the action item candidate and the replay information from the collaboration work assistance system (10, 11); and a display control unit configured to display the received action item candidate and the replay information on a display. a detection unit configured to detect an action item candidate from voice-text data converted from recorded video data or recorded audio data, and replay information of the recorded video data or recorded audio data corresponding to the action item candidate, by performing morphological analysis processing on each sentence of the voice-text data converted from the recorded video data or recorded audio data, and detecting a particular action item of one sentence including a combination of at least two elements from three elements probably indicating a content of the particular action item, a particular execution person of executing the particular action item, and a particular due date of the particular action item as the action item candidate; and a transmission/reception unit configured to transmit, to each of the user terminals, the action item candidate, and the replay information of the recorded video data or recorded audio data corresponding to the action item candidate, each user terminal including: a reception unit configured to receive the action item candidate and the replay information from the collaboration work assistance system (10, 11); and a display control unit configured to display the received action item candidate and the replay information on a display. a reception unit configured to receive the action item candidate and the replay information from the collaboration work assistance system (10, 11); and a display control unit configured to display the received action item candidate and the replay information on a display.