A medical imaging system with a mechanical arm (3) comprises a support (1), a probe (2), the mechanical arm (3), and a controller. The mechanical arm (3) is mounted on the support (1). The probe (2) is mounted at one end away from the support (1), of the mechanical arm (3). The controller can drive the mechanical arm (3) to drive the probe (2) to implement multi-degree-of-freedom movement. The medical imaging system uses a structure that the controller drives the mechanical arm (3) to drive the probe (2) to implement multi-degree-of-freedom movement, so that working intensity when staff such as doctors operates the probe can be lowered, thereby alleviating operation fatigue of the staff such as the doctors.
