The aim of this study starts from the development of internet using motivations scale of primary school students, in order to construct the motivation model of internet using for the reference of the following research. The sample was selected from the primary school students of Kaohsiung city and county, base on purposive sampling, with a total of 200 questionnaires from which 200 valid ones obtained that makes a 100% validity rate. The data were analyzed in SPSS 12.0 with statistic method. The results of the development of internet using motivations scale show. 1. Talking and making friends 2. Pleasure and entertainment 3. Playing games 4. Relaxing pressure 4 dimensions and 24 items totally. According to the results, we suggest that the following researchers will analyze each internet using motivations based on this study in order to provide contributions of the course design of schools and educational institution.