The invention discloses an indoor air humidity and carbon dioxide index controller of a planting greenhouse. The controller is composed of a controller base, an air filter net, a base sealing gasket,a sensing air connection pipe, an electric blower, a main control circuit board, a power supply circuit board, a display circuit board, a control circuit board, a power switch board, an upper controller cover, a panel, a gas pipe and a gas transmission cover. The indoor humidity and carbon dioxide index in air in a planting greenhouse can be monitored and warned early in real time, so that the indoor air humidity and carbon dioxide index of the planting greenhouse meet the effective plant growth requirement and the indoor air quality of the planting greenhouse is improved. Moreover, the indoorair humidity and carbon dioxide index controller having advantages of having a simple structure, being easy to manufacture, being operated simply and conveniently and having a broad market has the broad application prospects in the modern precision agriculture production.