This paper mainly discusses the competing change of the literary and the colloquial in Taiwan Southern Min. The result of the competing is not unidirectional. Most of all, the literary stratum is easily replaced by the colloquial stratum. However, there are still some examples that the literary stratum invades the colloquial stratum and then replace it. The frequency of occurring is one decisive factor of the replacement. If the occurring frequency of one stratum is lower than that of the other, it will be easier to be invaded and replaced by the other.