In　order　to　make　full　use　of　user-side　energy　storage　resources　and　maximize　user-side　energy　storage　revenue,　a　user-side　energy　storage　optimization　configuration　method　that　participates　in　the　ancillary　service　market　is　proposed.　First,　the　full　life　cycle　cost　of　user-side　energy　storage　and　a　revenue　model　considering　ancillary　services　were　established.　Secondly,　considering　the　operating　characteristics　of　energy　storage　batteries　and　user　load　characteristics,　a　user-side　energy　storage　optimization　configuration　model　participating　in　auxiliary　services　was　established.　Using　energy　storage　capacity　and　auxiliary　service　parameters　as　optimization　variables,　the　full　life　cycle　of　industrial　user　energy　storage　was　analyzed.　Optimize　calculation　of　net　income.　Finally,　taking　a　certain　local　energy　storage　auxiliary　service　market　as　an　example,　the　configuration　optimization　of　user-side　energy　storage　participating　in　auxiliary　services　was　realized.　©　2023　IEEE.