Systems and methods for medical imaging diagnoses are provided. The methods may include detecting an entrance of the scan platform into a scanning room by a signal emission device, moving the scan platform to a joint area according to connection interface of the medical imaging device by a driving device. The method may also include adjusting the scan platform to connect to the medical imaging device by a position adjusting device. The method may also include connecting the scan platform to the medical imaging device by a physical interface. The method may further include moving the scanning object to a scanning area of the medical imaging device by the driving device.