The invention belongs to underwater noise measuring device for underwater acoustic engineering. It is a recoverable submerged system with functions of automatic and remote controls. It comprises underwater recording part and onground processing part. The former is comprised of a submerged body, a releasing unit and an anchoring weight. It can work under water of 300 m deep for a long period and record underwater noise in realtime from 1-100KHz according to programed command or remote on-ground command. It has functions of ranging, novigation, automatic recording and automatic alarming. It can be released and recovered through on-ground command and its records can be analysed by the on-ground processing part of the system.