Flat-roof sloping greenhouse was introduced to improve cultivation environment in sloping field tomato cropping. The results and problems were as follows:
1) Rain shelters built in sloping fields have various structures. Their narrow working space had been a problem in some cultural works.
2) Flat-roof sloping greenhouses have flexibility in designing and good for sloping fields. It was low-cost in spite of the high-intense structure. And they have good efficiency for production smooth ventilation and extension of the cultivation area.
3) Flat-roof sloping greenhouses were introduced to improve the farm's profit by sweet pea cultivation in winter in addition to the tomato cultivation in summer.