Nowadays most of the developing countries use traditional paper documents management system (DMS), but also the electronic form of the documentation has increased including e-mails, web pages, and database packages, which have been stored in workstations and servers. For integrated data gathering in an institution or organization, electronic document management system (EDMS) often becomes one of the most required tools for management. However, this requirement should be implemented careful1y depending on the institution or organization need. Therefore, organization should have an EDMS for creating, keeping and organizing data in the organization and handle all synchronization process. In this research, system requirements for computer science institution of polytechnic university is analyzed, software design and identifying available resources is determined and a desktop based application is developed and implemented successfully. Distinguishing the developed EDMS from other management systems is that it adds document notation for external documents and existing digital signature technique has been modified and new features added for improving security level. In addition, security of archived files is increased by monitoring the contents of the documents. Finally, institution structure is customized and can be modified based on the system administrator's request.