1. An error-detecting method for a Chinese article, applied in a computer system, applicable for handling a Chinese sentence comprising a first erroneous Chinese character string in a first location, comprising: using a processor of the computer system to execute the following steps of: subdividing the first erroneous Chinese character string into a plurality of first subgroups, wherein each of the first subgroups consists of two consecutive or non-consecutive Chinese characters out of the first erroneous Chinese character string, wherein the Chinese sentence further comprises a second erroneous Chinese character string in a second location; providing a database comprising a plurality of first correct Chinese character strings and a plurality of corresponding first correct indices, wherein the first correct indices consist of two consecutive and non-consecutive Chinese characters out of the first correct Chinese character strings, wherein the database further comprises a plurality of second erroneous indices and a plurality of corresponding second correct Chinese character strings; acquiring one of the first correct indices according to the first subgroups, and one of the first correct Chinese character strings according to the acquired first correct index; generating a best candidate sentence according to the acquired first correct Chinese character string; setting the acquired first correct Chinese character string as a first candidate term and generating as second candidate term according to the second erroneous indices; determining whether the second erroneous Chinese character string is the same as one of the second erroneous indices; and showing the Chinese sentence and the best candidate sentence on a display device.