The present disclosure relates to a pyrido[3,4-d]pyrimidin-8-one derivative compound exhibiting excellent anti-proliferative effects against cancer cells, a pharmaceutically acceptable salt thereof, a hydrate thereof, or a stereoisomer thereof, a production method therefor, a pharmaceutical composition for preventing, alleviating or treating cancer metastasis and proliferative disease containing the same as an active ingredient, and an anticancer composition against cancer cells. The compound exhibits excellent cancer cell inhibitory activity and anti-proliferative effects, and thus is effective in inhibiting cancer cells, preventing cancer metastasis and proliferative diseases or treating cancer.