The resolution of monochromator becomes much higher with the development of synchrotron radiation beamline technology

it demands high performance of control software to drive the complex configuration of mechanical rotation and translation. On the other hand

with the number of the constructed beamlines increases rapidly

it imposes a large force on developing

a migrated and standard control software. A multi - layer technology introduced to variable angle spherical grating monochromator (VASGM) control in which the layers being inter - connected by Ethernet was discussed. The lower layer

a hardware abstract layer

operates the hardware directly and the top layer

a graphic user interface

processes the user’s command and passes corresponding operation to the lower layer. The top layer can be flexibly connected with different control software. A numeric solution of VASCM was also given.