The utility model relates to an agricultural information ization equipment technical field especially relates to an agricultural implement goes up and down to monitor sensing device and have device'sagricultural machinery work monitoring system. The utility model discloses an agricultural implement goes up and down to monitor sensing device and includes the sensor and hang the mechanism, hangs the establishment of institution and between two wheels, just articulates through lower link and agricultural implement, and the sensor is installed on the lower link for it measures to carry out the angle gesture to the promotion of lower link. The device utilizes gesture measuring principle, through the angle of sensor response lower link promotion to realize the non -contact gesture and measure to have and measure accurate, reliable and stable, advantage such as fragile measuring equipment not, the installation is simple, and convenient to detach does not receive field environmental impacts such as straw when just measuring, in addition, the physical interface of sensor adopts multiple communication mode, and the host computer of being convenient for inserts data, has guaranteed the datatransmission reliability and the convenience of agricultural machinery work monitoring system.