Interpreting the connotation of online presence, and conducting a questionnaire survey on the level of online presence of college students from three dimensions: teaching presence, cognitive presence, and social presence. The survey results were analyzed from the perspective of descriptive statistics and group difference statistics. Taking the computer common course "Database Technology and Application" as an example, the survey results and subject characteristics provide strategies for the construction of online learning space。In this way, providing experience accumulation for promoting the innovation and development of online learning space.