Now a day's people are going through many problems related to security of systems, so security is the most important thing nowadays.  In this paper, we try to mention all study related to the security system, basically the system which related to the door lock and main entrance of buildings, which is helpful to prevent an issue like robbery. In past years, the research is gone on different door lock security systems like systems which provide indications of the buzzer. Due to the modern technology, some door lock security systems are based on Arduino, raspberry, the microcontroller also with subcomponent like GPS, GSM, RFID, face scanning, biometric scanning etc. each component is defined with their positive and negative points. In most of systems, SMS technique is used for communication to the system will become cost-effective, more reliable and it will take less time to deliver the message. As security having a big issue nowadays, the security monitoring systems today need to make use of the latest technology. In some papers, the authors have presented door lock security monitoring system based on embedded and Zigbee and sometimes the lock is protected by automatic password hence it could not easily hack by hackers. Also, the raised security systems are available based on Android platform, wireless techniques, and embedded systems. A lot of modification takes places in various Door lock security from the last few years, in next coming years, many changes will take place.
                                
                                
                                    
                                    Door Lock Security, GSM, RFID, SMS, buzzer, Biometrics, Password  
                                
                                
                                
                                
                                    
                                        
                                        
                                        
                                        
                                            
                                                
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