21 century belongs to life science. The main tasks of medicine now are keeping and improving mankind’s health, not that merely preventing and treating diseases as it used to be.
　　 Doctors are now facing the whole people not only the patients, so in Eroupe and Northern America, half doctors give healthy instructions to people in community but not in hospital. However, in China, 97% doctors still work in hospital. It is expected that with the development of society, more doctors will face non-patients who need healthy suggestion in the community.
　　Moreover, in the future, construction of speedy and convenient way to emergency is pressing, which is not cognized nowadays.