This study was aimed to investigate spatial and vertical characteristics of greenhouse environments according to the location of the environmental sensors, and to investigate the correlations between temperature, light intensity, and carbon dioxide (CO 2 ) concentration according to the type of greenhouse. Temperature, relative humidity (RH), CO 2 , and light sensors were installed in the four-different vertical positions of the whole canopy as well as ground and roof space at the five spatial locations of the Venlo greenhouse. Also, correlations between temperature, light intensity, and CO 2 concentration in Venlo and semi-closed greenhouses were analyzed using the Curve Expert Professional program. The deviations among the spatial locations were larger in the CO 2 concentration than other environmental factors in the Venlo greenhouse. The average CO 2 concentration ranged from 465 to 761 µmol•mol -1 with the highest value (646 µmol•mol -1 ) at the Middle End (4ME) close to the main pipe (50∅) of the liquefied CO 2 gas supply and lowest (436 µmol•mol -1 ) at the Left Middle (5LM). The deviation among the vertical positions was greater in temperature and relative humidity than other environments. The time zone with the largest deviation in average temperature was 2 p.m. with the highest temperature (26.51°C) at the Upper Air (UA) and the lowest temperature (25.62°C) at the Lower Canopy (LC). The time zone with the largest deviation in average RH was 1 p.m. with the highest RH (76.90%) at the LC and the lowest RH (71.74%) at the UA. The highest average CO 2 concentration at each hour was Roof Air (RF) and Ground (GD). The coefficient of correlations between temperature, light intensity, and CO 2 concentration were 0.07 for semi-closed greenhouse and 0.66 for Venlo greenhouse. All the results indicate that while the CO 2 concentration in the greenhouse needs to be analyzed in the spatial locations, temperature and humidity needs to be analyzed in the vertical positions of canopy. The target CO 2 fertilization concentration for the semi-closed greenhouse with low ventilation rate should be different from that of general greenhouses.