In Chinese medical theory, it is thought that if the "Yin and Yang balance, person will be healthy." Chinese medicine studies the human body as a whole which has specific functions. Chinese medical main and collateral channels are confirmed by experts at home and abroad as Ra kind of internal structure system that really exists.S It has been confirmed that imbalances caused by almost all diseases can be reflected in main and collateral channels system; the channels can adjust and control the physiological function and pathological expression of human body's viscera and bowels. The adjustment for the human body can be accomplished through reaction points of body surface and main and collateral channels. Since 1989, the studies of other countries have confirmed that the human body is a combined control system that owns various adjustment mechanism. The adjustment and control for human body state can be accomplished through biological information. Based on the above theory, the authors of this paper designed the instrument that can make diagnosis and treatment automatic. Biological information sensors are attached to the points of main and collateral channels, and they sense the signals of disease of the human body. Through an A/D converter, the signal is input into a microcomputer. The CPU makes a comprehensive analysis and diagnosis according to the program and the signs and amplitude of signal deviation values detected from the left and right main and collateral channels points; it gives relevant information treatment prescription. After D/A converting, the information treatment wave generator is activated. The composed information wave treats the human body through the main and collateral channels points, and the changes after treatment are fed back to the computer through biological information sensors to amend the treatment prescription and generate the new information treatment combination wave, which is again fed back. At last, the body system will reach stability and balance through many circulations. Through 300 cases of clinical practice, the total effective rate for 22 kinds of disease such as stomach ache, coronary heart disease, and Meniere's disease reaches 90.0%. Among these, the marked effect accounts for 7.3%; the improvement accounts for 82.7%. After processing by statistics, it shows that the instrument has a marked curative effect. In theory, the instrument has the functions of diagnosis, treatment, health care, adjustment of body immunity, prevention of cancer, the curing of nerve functional diseases and some nerve and spirit diseases, etc. It is estimated that the instrument will be used in more fields; it has good application prospects, and will become a new therapy in home medical care.