The invention discloses a mobile air cleaner and a mobile air cleaner control method. The mobile air cleaner comprises an air cleaner body, a driving assembly for driving the air cleaner body to move, an inertial detection device arranged above the air cleaner body for detecting an acceleration mutation value of the mobile air cleaner, and a controller for controlling a movement path of the mobile air cleaner, judging whether collision happens to the mobile air cleaner when the acceleration mutation value is larger than a preset threshold, judging the position of an obstacle according to the acceleration mutation value and planning the movement path again according to the position of the obstacle. According to the mobile air cleaner disclosed by the embodiment of the invention, as the inertial detection device can be arranged above the mobile air cleaner body, problems that the machine topples and is damaged and the like in the prior art can be avoided, and as the inertial detection device occupies little space, integrity of machine appearance design and attractiveness of industrial design are enhanced.