The device is specially designed for monitoring pets’ daily activities (cat and dog). It attaches to the collar and records 24 / 7 activities. With the help of a cloud computing technology, the activity data will be analyzed and translated to calories consumption information, pet’s health index and mood index and finally reports detailed numbers on the app interface for each function like activities, calories, sleep, etc. This information can help owners to get more in-depth knowledge about their pets’ physical and mental condition. The concept of this design is to encourage the owners to pay more attention to their pets and enjoy happiness with each other.