This paper reports a Needs Analysis survey done on Chinese graduate students majoring in science for an open English for Academic Purpose (EAP) course design. By conducting a survey about the sample group, the researchers attempt to discover graduate students' needs, difficulties, and study habits in English learning, what contents and skill instructions should be included in an online EAP course and how designers and instructors can better involve students in online EAP learning activities. This preliminary Needs Analysis research may provide a basis for innovative online EPA courses design and delivery, and help the selection and preparation of open EPA educational resources.