Report Cooperative Education To improve the work of the department messenger case study of Cargo Network Dili Discovery (Thailand) aims to study the variations in the performance of the operational departments Sea Export Customs Cooperation. it is found in parts of the operation, the lack of continuity in the operation, making the problem is the delay. From the study and data collection. To resolve on the part of the workers lack of continuity in the operation. Cause problems in terms of delays. So ECRS technique to create a new work order form is editing tools. Due to the loss of jobs in order to pay the fee or messenger to redeem B / L, D / O, making it work in that part of the delay and redundant work. From the foregoing, the worker was taken as the source of the problem and Visual Control techniques in order to improve and modify the workflow. To work with a clear and more effective. And after the process in order to improve the department's messenger, making the rate of loss of documents, orders fell. From April 17 2559 and May 2559 the number of one-time loss of documents, representing a decrease of 94.12%.