During the 80s, in conjunction with extensive land development, the capital costs of salt making and the quality of the final product made it impossible to compete with imported salt for market share. Furthermore, those willing to do the backbreaking work of exposing the salt to the sun were becoming harder to find. Therefore, in 1991 the Ministry of Economic Affairs designated the Annan district as the "Tainan Technology Industrial Park."
八十年代，因土地開發，製鹽成本與品質難與進口鹽相比，加上曬鹽這樣辛苦的工作也後繼無人，經濟部於是在民國八十年將安南區規劃為台南科技工業區。