The utility model relates to a petrochemical technology field provides a pipeline thickness measuring device and pipeline thickness measurement system. This pipeline thickness measuring device includes: apron, fixed bed and two at least connecting pieces, the fixed bed set up in the one end of apron, the other end of apron is provided with the handle, be provided with the heat preservation in the fixed bed, the connecting piece set up in on the apron, the connecting piece is including pegging graft card in the spliced eye of pipeline, the card is followed the apron the axis set up in on the apron. The utility model discloses in peg graft in the spliced eye of pipeline in the card of apron through setting up, take off when measuring the apron and with cover connection's heat preservation, measure and fix apron and heat preservation and pipeline after finishing. Have simple structure, fitting limit advantage such as wide and simple and convenient, bring the normalized management for oil plant fixed point thickness measuring.