The invention relates to a textile production control technology and aims to provide an anti-overbaking multifunctional on-line measurement and control system of textile printing and dyeing fabrics. The system comprises a humidity measurement roller used for humidity detection, wherein the humidity measurement roller is connected to a signal conditioning circuit through a signal wire, and the signal conditioning circuit is connected with a control plate processor; the control plate processor is connected to an electronic control device of a steam valve through a signal wire; and the steam valve is positioned on a steam supply pipeline for drying steam. Due to the effective use of the system, the purposes of accuracy control and automatic regulation are achieved, and finally, an ideal humidity of the fabrics is obtained. Overbaking cannot be caused, thereby the steam and energy are effectively saved, which directly and most benefits printing and dyeing mills by using the system.