The invention relates to a port warehousing logistics technology, in particular to a bulk material yard unmanned stacking/reclaiming technology. Firstly, a database is established; secondly, operation instructions, automatic stacking/reclaiming operation modes and control instructions for automatic stacking/reclaiming operations are generated through input operation kinds of goods and the planning work amount; thirdly, the relevant instructions are sent to a central control PLC and then transmitted to the corresponding local stacker/reclaimer PLC through the industrial network; fourthly, the local PLC controls the operation of all components of the stacker/reclaimer to complete the local operation control. At the same time, a material stack laser scanning device is used to scan the material yard condition, and the scanned result will then be transferred to a central control processing unit through the industrial network; fifthly, the central control processing unit achieves the stack type scan data processing of the stacker/reclaimer to generate new instructions which will then be sent to the corresponding local stacker/reclaimer PLC; sixthly, a handle operating panel arranged inside a central control room can be taken as a backup means of manual operation under special circumstances. The invention can be applied to large-scale raw material yards, such as ports, wharfs, open warehouses, mine stacking yards, as well as iron and steel enterprises.