The invention provides a multi-energy energy collection system based on a capacitor pool, which comprises an electromagnetic energy collection circuit, a light energy collection circuit, a temperaturedifference energy collection circuit, and a multi-element energy collection circuit. The system converts various kinds of energy (electromagnetic energy, light energy and temperature difference energy) into electric energy through the circuit modules and collects the electric energy, the electric energy is released when needed, and thus, the originally wasted energy can be effectively used, energy waste can be avoided to a great extent, the phenomenon that a single energy source collects energy and the collection efficiency is limited is remedied, and stable use of the low-power-consumption internet-of-things equipment can be ensured.