The invention discloses a monitoring system used for information network engineering supervision. The system consists of a host, multiple digital safety helmets and a handset. The handset is in a cuboid structure and provided with an aspect sensor, a laser measuring device, a vertical sensor, an angle sensor, a display and a single-chip microcomputer; and the aspect sensor, the laser measuring device, the vertical sensor and the angle sensor are separately connected to an input port of the single-chip microcomputer through an interface circuit, and a display port of the single-chip microcomputer is connected to the display. The system has advantages of high degree of automation, accurate measuring results, strong information processing functions and convenient operation, and is the embodiment of the workloads and values of supervision. Electronic supervision logs can be provided as the original records and real working basis of supervision works during an engineering implementation process so that the true and comprehensive of the supervision can be ensured. The measuring can be performed by using a laser of the handset at distance segments which cannot be measured with a tape measure conveniently, and the measuring results are accurate.