0bjective Exploration of the application effect of a new way of collecting patient′s telephone information to emergency diagnosis and treatment process reengineering in outpatient and emergency department. Methods Relying on the hospital information system platform, design and implement timely collection and validity verification mechanism of mobile phone data in outpatient and emergency department network sub-platform; before and after the implementation of the evaluation of 500 cases of patient registration time, telephone information accuracy. Statistics before and after using the 200 patients with critical value received report (short message, telephone) response time should be again;medical treatment satisfaction. Results The sub-platform realized the timely modification of telephone information through multi-function exchange terminal when patients visited the hospital. There was no statistical significance in the time of registration of patients in the two groups (P>0.05), the registration time was not extended. The accuracy rate of telephone information was 98.4% (492/500) in the experimental group, and 66.6% (333/500) in the control group, there was differences between the two groups (χ2=176.70,P<0.05). After the implementation, the number of the 200 patients who received critical value report (text message, phone call) and answered again within 30 minutes was 189, and there were 132 cases before implementation, there was difference before and after implementation (χ2=69.38, P<0.05). The patients′satisfaction with emergency treatment in the control group and the experimental group was 68.5%(137/200), 95.5%(191/200), there was significant difference (χ2=51.80, P<0.05). The doctors′satisfaction with the system in the experimental group and the control group was 94.0%(188/200), 65.5% (131/200), there was significant difference (χ2=51.25, P<0.05). Conclusions The method of telephone information collection of patients was optimized, and the quality and management level of emergency diagnosis and treatment were improved, and the information construction of door and emergency room was promoted.