We forecast Taiwanese total fertility rate, total number of births, total population for next 50 years. We find that total fertility rate will rebound to 1.6 children at most in 2024 and 1.5 children at least in 2044. The total number of births will begin to decrease from about two hundred thousand to one hundred thousand in 2024. This also follows that total population begins to decrease. The main reason is that the childbearing-year women decrease continually. Even if the fertility rate is raised, the total population will decline in the future. Aging population and low fertility are both in the future Taiwan.