This study measured the economic values of landscape and species diversity in mountainous pasture using a choice experiment. The attributes considered were landscape (forest, pasture, or pasture in forest), species diversity (180, 200, 225, or 250), and levy (five levels from 4,000 to 12,000 won/household). An online survey was administered to residents in 17 metropolitan cities and provinces in Korea. The results of the multinomial logit model showed that pasture in forest, all variables for species diversity, and levy were statistically significant. Age was statistically significant, implying that older people tend to prefer forest areas. The results also indicated that the willingness to pay for changing 1 ha of forest into pasture decreased by 74.3 won/household, while that for changing forest to pasture in forest increased by 1,338.1 won/household. The marginal willingness to pay for changing from species 250 to 225, 200, and 180 was estimated as -782.7, -2,647.1, and -4,492.6 won/household, respectively. The results of this study can provide useful insights for the development of mountainous pasture in Korea.