A scanner with a controller for controlling movement of a scanning module during scanner maintenance is provided. The scanner includes a housing, a transparent platform, and a scanning module installed inside the housing for scanning a document. The scanning module can move from a home position to a position corresponding to the document. The scanner also includes a driving device for driving the scanning module and for driving the scanning module back to the home position after the scanning module has scanned the document, and a controller for controlling the driving device. When the scanning module is at the home position, the controller can cause the driving device to drive the scanning module to a maintenance position and stop the scanning module at the maintenance position.