Nowadays more and more enterprises transform into service-oriented infrastructure to sustain their competitive advantage. Although IT is an enabler of service-orientation, IT must align with business strategies to deliver expected value. In order to ensure the investment of service-oriented IT can improve the quality of customer service effectively, we aim to develop an IT-business alignment framework to assess the quality of alignment in the context of service-oriented enterprises. In our framework we propose three components of IT-business alignment: strategic alignment, operational alignment and social alignment. The strategic alignment is the degree to which the business process and information can support corporate service strategies. The operational alignment is the degree to which information systems fulfill the information and process needs of service orientation. The social alignment is the degree to which a common service climate is shared between IT and business units. Our data is collected from web questionnaires. The total data set constitutes a representative sample of n=300. Among all returned questionnaires, 96 were found to be complete and usable; this represented a response rate of 32 percent. From this research we get four conclusions: (1) Regardless of customer integration level, strategic alignment plays a significant role in improving customer service quality. (2) Strategic alignment is particularly influential to customer service quality when the enterprise is not service-oriented. (3) Operational alignment is not significant; however with the increasing of data integration level, enterprises increasingly emphasize the operational alignment. (4) Regardless of service-orientation; social alignment effectively helps enterprises make good customer service quality and retain customers. / Nowadays more and more enterprises transform into service-oriented infrastructure to sustain their competitive advantage. Although IT is an enabler of service-orientation, IT must align with business strategies to deliver expected value. In order to ensure the investment of service-oriented IT can improve the quality of customer service effectively, we aim to develop an IT-business alignment framework to assess the quality of alignment in the context of service-oriented enterprises. In our framework we propose three components of IT-business alignment: strategic alignment, operational alignment and social alignment. The strategic alignment is the degree to which the business process and information can support corporate service strategies. The operational alignment is the degree to which information systems fulfill the information and process needs of service orientation. The social alignment is the degree to which a common service climate is shared between IT and business units. Our data is collected from web questionnaires. The total data set constitutes a representative sample of n=300. Among all returned questionnaires, 96 were found to be complete and usable; this represented a response rate of 32 percent. From this research we get four conclusions: (1) Regardless of customer integration level, strategic alignment plays a significant role in improving customer service quality. (2) Strategic alignment is particularly influential to customer service quality when the enterprise is not service-oriented. (3) Operational alignment is not significant; however with the increasing of data integration level, enterprises increasingly emphasize the operational alignment. (4) Regardless of service-orientation; social alignment effectively helps enterprises make good customer service quality and retain customers.