The invention discloses a self-adaptive online learning client system, which comprises a classroom module, a rendering module, a management module, an underlying module and a communication module. Theclassroom module is used for generating a virtual classroom; the management module is used for creating class examples; the rendering module is used for realizing page rendering of the virtual classroom generated by the classroom module and the class examples generated by the management module; the underlying module is used for providing data support for the classroom creating module, the rendering module and the course management module; the TCP communication module is used for realizing TCP protocol based remote communication of the classroom module and the management module. By the self-adaptive online learning client system, stable online teaching under multi-terminal complex conditions of Windows, Mac, iPad and the like can be realized. In addition, video communication and voice based class interaction is realized, and online teaching quality is improved.