Abstract— School libraries should be accredited with the aim
of improving the quality of libraries. Pekanbaru City Library and
Archives Service (DISPUSIP) in determining a school library that
deserves to be accredited is still done manually, namely DISPUSIP
went directly to the field to monitoring the library in the school
and the data collection still used manual entries. Meanwhile, a lot
of data must be collected, causing the data to be inaccurate and
take a long time. For this reason, a decision support system (DSS)
is needed. The data used are nine junior high schools both public
and private as an alternative. While the criteria refer to the school
library accreditation instrument issued by the National Library
(Perpusnas) consisting of six criteria, namely collections, library
facilities and infrastructure, library services, library staff, library
administration and management, and reinforcement. Data
analysis using the TOPSIS method by steps of determining the
decision matrix, normalization matrix, calculating both positive
and negative ideal solutions, calculating the distance to the ideal
solution, calculating preference values, and ranking. The results
obtained for the SMP library are Sek 4, Sek 1 and Sek 5 which are
eligible for accreditation.