The invention discloses a computer teaching instruction system based on a cloud platform. The system comprises a teacher terminal, an education cloud platform and a student terminal, wherein the teacher terminal, the education cloud platform and the student terminal are connected through the Internet; the teacher terminal comprises a registration module, a man-machine interaction module, a remotecontrol module, a puzzling question solving module, a measuring and control test question evaluation module, a student learning situation evaluation module and a task allocation module; the student terminal comprises a registration module, a man-machine operation module, a student learning situation monitoring module, a measuring and control module, a puzzling question summarization module and a learning file calling module; the education cloud platform is internally provided with a puzzling question releasing module, an identity recognition module, a posture judgment module, a data calling module, a learning/teaching file database and a question database updating module. By adopting the system, the learning efficiency of students can be improved.