Provided is a touch control system of an electronic product in underwater environment. The touch control system includes a sealing device which is configured to accommodate the electronic product. The sealing device includes a sealed chamber interlayer and a sealed shell. Herein the sealed chamber interlayer is opposite to the touch screen of the electronic product and is capable of being pressed and rebounded and is transparent, and the sealed shell is connected with the sealed chamber interlayer in a sealing manner. The sealed chamber interlayer covers a surface of the touch screen completely. The sealed shell covers other surfaces of the electronic product, and implements touch control to the touch screen by applying an external force to the sealed chamber interlayer. Underwater high-accuracy maneuverability of the touch screen of the electronic product may be implemented when an external force is applied to the sealed chamber interlayer by a finger.