The invention provides a hidden-bus-type data acquiring management system of a diesel engine. The system comprises a diesel engine data acquiring control terminal network, a field bus, a mobile internet data terminal, a mobile communication network, a cloud server and an internet terminal. The system is further provided with a special floor assembly for paving the bus; two of floor blocks are provided with wire incoming and outgoing holes. The system has the beneficial benefit that important significance is shown on the product upgrading of a diesel engine monitoring instrument, remote monitoring of the diesel engine, and remote assistant fault diagnosis; the bus is paved below a floor; the wire is inserted and drawn out through the wire incoming and outgoing holes 11. According to the system, the device bus is hidden below the ground surface, so that the electric leakage caused by accident and the stumbling accident can be avoided.