In this pa per , the oper atio n principle of the cr ane a nd the pr ocess o f the r otat ion contr ol sy st em a re descr ibed br iefly. T he technical innov atio n of the cr ane co ntro l sy stem by pr og ramma ble contr oller , including the hardw are str uct ur e of the cr ane PLC contr ol sy stem, t he so ftw are pr og ramming is discussed in detail.