Plantation of horticulture crop in Malaysia is growing restrict locally at the highland. This is due to the climate necessary of horticulture crop. Thus, plantation of those crops in the lowland tropic is a difficult task. However, the horticulture plant can be cultivated in lowland unless there is huge investment in term of Environmental Sciences facility, space and modal. Besides, greenroom equipment on current market is unaffordable for people who do have interest in cultivate small scale horticulture plant in home or office. One solution to this is by designing a horticulture greenroom suitable for small spaces, low cost and intelligence climate control. By using the humidity, temperature, water level and light sensor, this system can automatically control and monitor heating, cooling, humidity, ventilating, and intensity of light according to the necessary condition of the crops. An integrated Liquid Crystal Display (LCD) is also used for real time display of data acquired from various sensors and the status of the various devices. Aside, the use of easily available components reduces the manufacturing and a maintenance costs. The design is flexible as the software can be changed any time. It can thus be customizing to the specific requirements of the user. The accuracy and efficiency is proving by conducting experiments on a 10-inch diameter rounding greenroom design. By using the recycle material, the greenroom is low cost and safe to the environment. Hence, the design of horticulture greenroom system is economical, low maintenance, and able to utilize a limited space in a residential unit to fulfill on horticulture plant requirement and is no longer limited to any place and time.