Bubbles and craft parameters in vacuum casting are the key factors to the quality of products. How to eliminate bubbles and set optimal parameters are the key technical problems to the automation development of vacuum casting. This paper advances a new vacuum casting automatic control system based on configuration software. Dynamic data exchange（DDE） among control module, detection module and execution module is realized based on the strong capability of communication and human-machine interface in configuration software. The realization of this control system can effectively eliminate bubbles and provide corresponding optimal craft parameters automatically and intelligently. In a word, the efficiency and quality of the products can be improved and the dependency of experience parameters can be reduced in vacuum casting.