This paper focuses on a study on the development of multiple intelligences among primary school pupils through science projects. The research bases on an experience of a successful "Primary Science Project Competition" which has been held for four years. When this event first launched, there were only about twenty teams participating, but grow to hundred more teams in the forth year. This reflects the recognitions and supports on science projects from both teachers and students. This study, which analyses mainly the video clips of pupils' science projects as well as the content of their written reports, aims at finding out the development of multiple intelligences among pupils through science projects.