Different from the predecessors, the thesis is a research about not only the Buddha’s wisdom of wealth during his life but also the efficient management of wealth fitting for modern people. Starting from the Samyutta Āgama, the content includes what the lay people should regard the wealth as and how they manage their earnings. Monastic Economy is not included. There are three points in the thesis. One is exploring and interpreting the Buddha’s perspectives of wealth; another is generalizing and classifying the Buddha’s models of personal finance through the comparison of Samyutta Āgama, Middle Length Āgama, Ratnakūṭa-sūtra, and Sutra of Contemplation of the Mind Ground and the observation of the socio-economic background of India at that time; the other is investigating the interaction of Buddhism and Capitalism through studying Weber’s theory about the inner religious inspirit in modern Capitalism. Traditional Buddhism is transformed to humanistic Buddhism. The interaction helps the new Buddhism preached all over the world.