Pipe material cutting planning method and device, and pipe material production method and system

The invention provides a pipe material cutting planning method and device, and a pipe material production method and system. The cutting planning method comprises the steps: acquiring length data of agroup of pipe materials to be produced; obtaining the length of current blank pipes and the length of a standard blank pipe; selecting a cutting planning principle; when the most material-saving principle is selected, taking the minimum tailing of each blank pipe as a limiting condition, and calculating the length combination of the pipe materials cut out by each blank pipe; when a pipe materialpairing principle is selected, calculating the length combination of the pipe materials cut from each blank pipe with the condition that the multiple pipe materials which are matched to form a finished product are sequentially cut as a primary limiting condition; and when a material-saving and convenient principle is selected, calculating the length combination of the pipe materials cut by each blank pipe by taking the con