Freshwater ecosystem, as sink of the terrestrial and anthropogenic carbon, is the most active bioreactor for global carbon biogeochemical processes and an important emitter of greenhouse gases (i.e. CO₂ and CH₄) to atmosphere, and then influences the global climate change and carbon cycling. CO₂ and CH₄ emissions from freshwaters have been extensively attentional in recent years given their importance, particularly that the emissions would be further enhanced by the increasing human activities. The urban small-scale landscape water bodies (including landscape pond, lake), featured by small area and large quantity, are a crucial component of urban ecosystem and strongly influenced by human activities. However, greenhouse gases emissions from such artificial-dominated waters are rarely studied and have been badly neglected. In the present study, for exploring the spatiotemporal variations and controls of CO₂ and CH₄ emissions from urban small landscape waters, we selected eight landscape water bodies and two natural water bodies in Chongqing, and carried out four seasonal investigations of CO₂ and CH₄ concentrations and emissions from the surface water in January, April, July and October in 2019 through the static chamber-gas chromatography technique and headspace method. Meanwhile, the vegetated and non-vegetated zones in the sampling water were monitored separately to identify the hydrophyte's disturbance. The result showed that CO₂ and CH₄ concentrations in urban landscape waters in Chongqing were widely supersaturated with range of 10.75-116.25 μmol/L (averaged (42.5±28.7) μmol/L) and 0.09-3.61 μmol/L (average of (0.98±0.80) μmol/L), respectively; the average CO₂ and CH₄ fluxes measured by the floating box method were (72.7±65.9) and (2.3±3.5) mmol m^-2 d^-1 respectively, indicating that the urban landscape waters were the net CO₂/CH₄ emission source. CO₂ and CH₄ emissions from the residential landscape waters were slightly higher than those from the landscape waters in campuses, but both were significantly higher than the two natural waters which were almost impervious to urban activity, suggested that the urban landscape waters could play a crucial contribution to the inland water CO₂ and CH₄ emissions on regional scale. In addition, the distribution of aquatic plants had a significant impact on the CO₂ and CH₄ emissions of landscape waters with that the emission flux from non-vegetated water was universally smaller than that from vegetated zone. CO₂ and CH₄ fluxes from urban landscape waters presented obviously seasonal patterns, there into, CO₂ fluxes were the highest in summer, followed by autumn, and the lowest in winter and spring, while CH₄ fluxes in summer were higher than that in autumn and spring, significantly higher than winter. Temperature was the critical factor determining the seasonal variation of CH₄ and CO₂ emissions, while CO₂ flux was also affected by water primary production. CO₂ emissions of landscape waters were significantly associated with the factors such as pH, nitrogen, carbon concentration and dissolved oxygen. Meanwhile, CH₄ emissions were mainly related to the carbon and phosphorus concentrations in surface water. The CO₂ and CH₄ fluxes from urban small landscape water bodies in this study were much higher than most of the previous survey on natural lakes, reservoirs and ponds, which highlighted the landscape waters may be a strong source of greenhouse gas emissions to the atmosphere, and plays a vital role in the greenhouse gas emission inventory from global or regional freshwater system, and thus more attention should be paid in future.