An image processing system includes a server, an image processing device, and a mobile terminal. When a chatbot activation operation is received, the image processing device transmits activation data for activating a chatbot and operation history data up to the time of activation of the chatbot to the mobile terminal. When the activation data is received, the mobile terminal accesses the server to activate the chatbot and transmits the operation history data to the server. When a question is input, the mobile terminal transmits the data on the question to the server. When the data on the question is received, the server generates an answer in accordance with the content of the question and the operation history.