This document describes an Android-based smart department system that allows users to control home appliances like lights and fans remotely using a smartphone. The system includes an Android application, an Arduino microcontroller board connected to home devices via relays, and a web server to facilitate communication between the app and microcontroller. The microcontroller acts as the central hub to receive commands from the app over the internet and switch devices on or off accordingly. The proposed system aims to provide a low-cost way to automate home device control and monitoring using a mobile phone.