As the many components of custom-made in Crane designing, we often adopt the personalized design method according to the orders and the method can cause the longer design cycle and more design error problems. For that reason, we propose a rapid designing system and architecture, adopting database to save the knowledge of design and selecting components smartly, founding model by the 3D software Solidworks, and drived by Visual Basic. Practice has proved that this system makes the design fast and accuracy, increasing to design requirement greatly.