Abstract: The physical problems in medicine are concerning with the applications of physical principles, theories and methodologies into prevent, diagnosis, therapeutics and healings for human health. Therefore, the medical physics formed by the combination of physics and medicine must be defined according the regulation of a first rank graduated program, which makes the students could be specialists in the field after they finished their school works in an equivalent time period with other mature science graduated program. We can learn these advantage knowledge from the earlier developed countries on medical physics from their more than 50 years developed experience. The mainstreams of Medical Physics in developed counties are the medical imaging physics and radiotherapeutical physics. But the all branches of Physics are already or going on to form their new developing directions in Medical Physics. Many new technologies, such as ultrasonic technologies, laser technologies, nanomaterial technologies, electric and magnetic wave technologies, magnetic resonance technologies, isotopic technologies as well as the technologies on ion sources and detectors are also the key technologies in Medical Physics. Although the problem how to define the range and class the branch of Medical Physics is not a main problem in the article, but I classed these problems as diagnosis, therapeutics, devices and software from the requirement of human health.