Biochip technology contains three fields which is genechip 、 proteinchip and chip laboratory. Biochip brings a tremendous revolution on modern biotechnology .And now, the biochip have been used in gene expression 、 discovery of new gene 、 illness diagnosis 、 screening medcines and gene sequence analysis, and would be widely utilized in biology、 medicine 、 chemistry 、 the war of bioweapons、 food and enviroment supervision etc.