Defect Tracking System is the system which enables to detect the defects. It not merely detects the bugs but provides the complete information regarding defect detected. Bug Tracking System ensures the user of it who needs to know about a provide information regarding the identified defect. Using this no defect will be unfixed in the developed application. The developer develops the project as per customer requirements. In the testing phase the tester will identify the defects. Whenever the tester encounters number of bugs he adds the defect id and information in the database. The tester reports to both project manager and developer. The defect details in the database table are accessible to both project manager and developer. When a customer puts request or orders for a product to be developed. The project manager is responsible for adding users to Defect Tracking System and assigning projects to the users. Defect information includes the defect id, defect name, defect priority, project name, defect location, defect type.This whole process continues until all the defect are got fixed in the application.