Agile enterprises are built based on agile business processes. Simultaneously, agile enterprises must be able to utilize agile business processes to rapidly respond market opportunities and maintain enterprises' competitions. But how to evaluate and choose agile business processes is a key problem about building agile enterprises. The paper proposes a goal driven method and an evaluation architecture for business processes' agility. Furthermore, a four layer configuring model for agile business processes is developed based on the evaluation architecture and it can evaluate and configure agile business processes among alternatives. Agile enterprises are built based on agile business processes. Simultaneously, agile enterprises must be able to utilize agile business processes to rapidly respond to market opportunities and maintain enterprises' competitions. But how to evaluate and choose agile business processes is a key problem about building agile enterprises The paper proposes a goal driven method and an evaluation architecture for business processes' agility. Furthermore, a four layer configuring model for agile business processes is developed based on the evaluation architecture and it can evaluate and configure agile business processes among alternatives.