The activity-based costing concept has been applied by many researchers or by various businesses in order to acquire accurate cost information that is crucial for the management decision. Along with time, the activity-based costing concept has been developed in order to overcome the complicate method of the conventional activity-based costing, which is time-driven activity-based costing. However, this new method still has a limitation in applying to some resources. Therefore the objective of this thesis is to provide practical steps in developing an integrated model between the conventional ABC and time-driven ABC. The data and information for the case study will be gathered from a selected refrigerated warehouse in Thailand. The research findings show that for the refrigerated warehouse management that has variation of activities in serving each customer, the activity-based costing model is a good instrument for achieving a better cost information. Moreover, the use of time equation helps to reveal the process of the operation in the warehouse and easy to adapt to any change in process required by the customer.