PURPOSE: To facilitate the input of maintenance information by storing the maintenance information in a computer main body.

CONSTITUTION: The camera 5, headset 6, portable information terminal 8, transmitter receiver 7, and headset 9 of the maintenance information processor 10 function as a maintenance information input means. Then voice data from the headset 6 connected to the computer main body 1 are inputted to the computer main body 1 as they are and voice data from the headset 9 connected to the portable information terminal 8, on the other hand, are inputted to the portable information terminal 8 temporarily and inputted from the transmitter receiver 7 connected to the computer main body 1 to the computer main body 1. In this case, the computer main body 1 processes the maintenance information inputted from this maintenance information input means into digital data through speech recognition when the information is a speech and performs image processing when the information is an image and stores them respectively, as a digital data, and this maintenance information is displayed at a display means 2 with an indication from a retrieval indication means.