(Will open in Google Docs) Greenhouse grape cultivation (GGC) has been an important part in grape production in China, and the ecological impact of the production system is vital for its sustainable development. This paper aims to evaluate the net carbon emissions and the overall impact on atmosphere of GGC and open-field grape cultivation (OGC) systems. A methodology of full carbon cycle analysis was adopted, and the net primary production, net ecosystem productivity and net carbon flux were chosen as the main indexes. The data were acquired through field investigations and chemical experiments. The results showed that both systems were the carbon source. The net carbon flux were 9.77 mg ha -1 year -1 and 1.17 mg ha -1 year -1. Compared to the OGC system, the GGC system is a bigger carbon source, however the carbon sink ability was improved and the NEP was increased by 2.18 mg ha -1 year -1. Minimisation the use of high carbon material in greenhouse building is a practical solution to reduction of carbon emission.
