The invention discloses a printing workshop temperature and humidity adjusting system, which belongs to the technical field of printing workshop environment monitoring and adjusting. The system comprises a sensing device, a centralized processor, an air conditioner, a dehumidifier and a humidifier, wherein the sensing device is arranged in the printing workshop; the centralized processor is connected with the air conditioner, the dehumidifier and the humidifier; the sensing device is internally provided with an integrated sensor for detecting temperature and relative humidity; the integrated sensor comprises a semiconductor detection unit, a secondary conversion unit, a signal processing unit and a display; the semiconductor detection unit is provided with two semiconductor strain gauges Repsilon1 and Repsilon2 arranged on a diaphragm with a radius to be r0; the output end of the semiconductor detection unit is connected with the secondary conversion unit; the output end of the secondary conversion unit is connected with the signal processing unit; and the signal processing unit is connected with the centralized processor. The system solves the problem that the cost of manual environment monitoring and manual environment adjusting is high due to influences on the printing work by the temperature and the relative humidity in the printing workshop, and has the advantages of automation.