PROBLEM TO BE SOLVED: To generate map data which more accurately reflects an actual waste amount distribution. SOLUTION: A dust amount map generation device 20 autonomously moves while detecting a position and a dust suction amount in association with time to suck dust, and a cleaning device 10 moves in a predetermined section to remove dust. An acquisition unit that acquires position data indicating a position when suctioning and dust suction amount data indicating a dust suction amount from the cleaning device 10, and movement of the cleaning device 10 in a predetermined section based on the acquired position data. It is estimated to be a route calculation unit 25 that calculates a route, and a dust amount estimation unit 26 that estimates the amount of dust in the peripheral area of the movement route of the cleaning device 10 based on the acquired suction amount data and the calculated movement route. The map data in which the display mode is changed according to the amount of waste is superimposed on the sketch data of the predetermined section, and the cleaned area is shown in a display mode different from the display mode of the waste distribution. It includes a map generation unit 27 to generate. [Selection diagram] Fig. 2
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