The purpose of the study was to find out and analysis the factors that can influence people's choice to mobile network service. Based on our research, we can give some practical advice to consumer and telecom companies.To achieve the purpose of the study we design a questionnaire and send it to our friends in Shanghai and Jinan China. The questionnaire was built around some questions about which factors can influence people’s choice and the importance of each factor.The study was performed with a quantitative research approach. We found five factors that affect users to choose different mobile networks, respectively usefulness, ease of use, price, speed and enjoyment. And in this paper we also proposed five hypotheses to test the relationship between these factors and gender. This provides us the theoretical basis to our research. The factors were included in our questionnaire, so the questionnaire gives the research some basic data. We analyze the data through the processional software SPSS.We have analyzed every aspect of our questionnaire. We put the data together and make visual figures. The figures make people easily understand the questions. Also these data help us understand the phenomena clearly and make a contribution to our study.Based on the findings, the research could be validated with a data analysis which gave grounds for the conclusion part.