The invention discloses a fixed value term matching method, which comprises the following steps: generating an eigenvector corresponding to each to-be-matched fixed value term; using the cosine theorem to calculate the cosine value of the included angle between the eigenvectors; determining whether the cosine value of the included angle is within a preset threshold range, and if so, determining that matching is successful. The invention also provides a fixed value term matching system. Via the above way, the correct rate of fixed value term matching can be improved, so that a large amount of manual operation can be avoided, and thus the work efficiency can be improved.