In elderly centre, each caregiver has to take care of around 40 elderlies, especially at night. It is impossible to monitor each bed regularly and make sure they are not going out (especially for those with dementia). Elderly with dementia may go outside at night without notice, or forget to turn off stove in kitchen. This monitor can take care of the elderly and assist the caregiver by alerting the status on bed and kitchen. It is just attached on wall or ceiling and ready to use. This easy-to-install monitor uses low-resolution infrared device to preserve privacy, while it can provide an accurate location monitoring of human on bed and abnormal heat source in kitchen.