The invention discloses an electronic coach realization method and system comprising the following steps: S1, obtaining ID information of a login user, and calling a sport scheme matched with the user ID; S2, guiding the user to move according to the first sport guide information message in an un-executed sport guide information series; S3, taking user sport images; S4, extracting a user present motion posture to compare with a standard motion posture, determining whether the difference of the two is in the preset range, if not, sending feedback motion error prompt information to the user and executing step 5, and if yes, executing step6; S5, sending present motion standard posture information to the user, guiding the user to repeat the present motion, and executing step3; S6, determining whether the presently executed sport guide information is the last sport guide information message or not, if yes, finishing the sport, and if not, returning to the step2. The electronic coach realization method and system can automatically compare and correct motions of the user in sports, thus guiding users to sport in real time.