OBJECTIVE： To improve the hospital workflow and efficiency in temporary drug purchase approval process. METHODS： The approval function for temporary drug purchase was introduced into office automation （OA） system in our hospital， and the effects were evaluated. RESULTS： According to ensuring the administrative approval process， system function permission assignment and approval process design in temporary drug purchase in our hospital， functions for approving temporary drug purchase were established in OA system. It achieved convenient， efficient， timely， networking and paperless approval work， as well as standardized record， checking out at any time and automatic statistics for drug purchase. CONCLUSIONS： Introducing temporary drug purchase approval function into hospital OA system can simplify workflow， provide better service for clinic， and promote development of hospital pharmacy management.