The invention discloses a method for realizing a medical and healthy care system based on the Internet of things, which consists of five parts, namely a medical sensing node, a wireless sensor network gateway, mobile terminal equipment, system software and terminal software. The medical sensing node acquires pathological information of a human body, such as blood oxygen, sphygmus, pulse and body temperature, by various probes, such as a blood oxygen probe, a pulse probe and a body temperature probe and then transmits data to wireless sensor network gateway equipment through a wireless sensing module; and the gateway equipment transmits pathological data to terminal equipment through an infrastructure network by implementing seamless switching among the wireless sensing network, an Ethernet and a wireless local area network to get rid of the restrict of wireline equipment and use related mobile equipment, such as a PDA and a smart phone, to monitor the pathological information of a patient conveniently and fast, in a hospital or a wireless network coverage. The system can be applied to daily life and work of people actually so that a medical personnel and a patient family member can conveniently and fast monitor the pathological information of the wirelessly and remotely.