The invention relates to a power grid technological transformation project reserve management method based on the bill of quantities. Compared with the prior art, the problem that there is no method to realize technological transformation project reserve management by making use of the bill of quantities at present is solved. The method includes the following steps: initializing basic data; generating a project proposal and importing data; examining and approving the project proposal; checking the fees of a power grid technological transformation project; and auditing the cost of the power grid technological transformation project. According to the invention, a cost list based on the bill of quantities is imported into the project reserve information, and power grid technological transformation project reserve management can be realized according to the pricing mode of the bill of quantities.