Tropical mountain cloud forests (TMCFs) are characterized by frequent and persistent cloud immersion and fog, resulting in a distinct environment which influences vegetation characteristics and determines ecosystem services. In this chapter we contrast the findings on function at the ecosystem (i.e. forest productivity) and plant (i.e. water and carbon relations) scales in Venezuelan Andean cloud forests with the current state of knowledge for TMCFs, in order to reveal its status, particularly in the context of the Andean forests. Research for the last 70 years on function of Venezuelan cloud forests were evaluated and compared with other TMCFs. Some of this research includes a vast number of studies of limited access available through theses, book chapters and other reports. Venezuelan cloud forests are important ecosystems showing levels of productivity and photosynthetic capacity in the range reported for TMCFs of the Andean region. Results on aboveground biomass were above the average, which could be related to relatively high canopy height, basal area, wood density, and low turnover rates. The reviewed data on ecosystem functioning coincides with recent findings on the importance of TMCFs as carbon stores and potential carbon refuges in the future.