Abstract: This paper mainly discussed the use of MEMS spectrum absorption photochemical gas sensor based on intelligent mobile phone platform.The characteristic spectrum of exhaled gas was obtained when the users use mobile phones,at the same time,it was sent to the cloud computing cloud storage odor database query in network,and BP algorithm was used for spectral features of disease code comparison.To these patients whose potential rate is more than a certain percentage the potential rate is more than a certain percentage,SMS alarm on disease characteristic code conforms to supervise the medical check.For early detection of severe disease,it can improve the medical effect,reduce the mortality of patients.

Key words: Olfactory,Gas sensor,Cloud computing,BP algorithm,Intelligent mobile phone,Severe disease,Diagnosis