The invention discloses an odor gas and control system device. The odor gas and control system device comprises an odor gas detector, a controller, multiple kinds of on-site sensors for a public facility and multiple kinds of multilayer circuit processing units, wherein the on-site sensors are an ammonia gas sensor, a hydrogen sulfide sensor, a carbon dioxide sensor, a carbon dioxide sensor, an air voice sensor, a wind direction sensor, an ambient temperature sensor, a noise sensor, an ozone sensor, a toluene sensor, a formaldehyde sensor, a nitrogen dioxide sensor, a sulfur dioxide sensor, an illuminance sensor, a humidity sensor, a rain and snow sensor, a mobile data sensor and a sensor expanding unit; the multi-layer circuit processing units are an oxygenating unit, a humidifying unit, a deodorizing unit, a sterilizing unit, a gas filtering unit, a gas replacing unit, a fumigating unit, a space pressurizing and decompressing unit and a processing expanding unit. The odor gas and control system device can effectively control odor gas.