The invention provides an Internet of things smart home remote alarm and control system, belonging to the technical field of smart home. The system comprises five parts, namely an Infineon ULC 2 platform, a detection circuit, a power supply circuit, a home appliance control circuit and an alarm circuit. The detection circuit, the power supply circuit, the home appliance control circuit and the alarm circuit are connected with the ULC 2 platform respectively; the input end of the detection circuit is connected with a human body infrared induction sensor, a smoke sensor, a gas leak sensor, a door / window vibration sensor and a water leak sensor. When a door / window is opened, gas leak occurs, a fire disaster occurs, a stranger intrudes, a water leak accident occurs or a power failure occurs indoors, the ULC 2 platform can send a text message to a cell phone of a user right away, and the user can send a corresponding text message to the ULC 2 platform through the cell phone to control the alarm circuit and home appliances. In addition, when the system is powered off, the system can be automatically switched to be powered by a UPS (Uninterrupted Power Supply). The system has the advantages that circuit components are less, and the system is convenient to install, easy to use, low in cost and extra low in power consumption.