The study developed a wireless communication sensing system combining with cloud service platform for greenhouses, which could synchronously sense 8 cultivation parameters of greenhouse crops, including the environmental temperature, humidity, CO_2 concentration, photosynthetically photon flux density, leaf temperature, soil temperature, soil water content, and soil electrical conductivity. The sensed data can be directly uploaded to the cloud service platform through a wireless network. Greenhouse managers may enter the platform using computers or mobile devices to query the real-time sensed data, the historical data, the analyzed charts and tables, and then carry out an effective cultivation and management to crops. The system can be replaced using different precision, price and brand of sensors according to the greenhouse operation requirements, which could be used in environmental monitoring for flower greenhouses, seedling centers, tissue culture rooms, and poultry buildings.