Designing an automation system for a smart office (SO) and then implementing it was done in this work through: heat regulation and adaptation, lights switches, and also security alarming systems as subsystems. There are many benefits of a smart office, some of which can be listed here as Boosting productivity, Better use of office space, Improving collaboration, motivating and enticing workers/employees to stay at work, keeping them entertained, and reducing the average time to repair. To smarten up your office, you can utilize displays in the meeting room, smart sensors to control the devices, and exploit modern technology. Extracting real-time data from the environment required sensors, which are processed to give a suitable output after passing through a controller. Some output devices are connected to the controller like; a buzzer, fan, and bulb. For security purpose keypad is used and also an extra module representing fingerprint identification. The goal of this paper is to implement a secure system that saves energy. Based on the persons entering or exiting the room, the light and fan will be turned ON or OFF automatically. Also, the light intensity can be adjusted according to the sunlight and the number of people in the place.