This　paper　is　focused　on　the　specification　test　of　functional　linear　quantile　regression　models.　A　nonparametric　test　statistic　is　proposed　based　on　the　orthogonality　of　residual　and　its　conditional　expectation.　It　is　proved　with　mild　assumptions　that　the　proposed　statistic　follows　asymptotically　the　standard　normal　distribution　under　the　null　hypothesis,　but　tends　to　infinity　under　alternative　hypothesis.　The　asymptotic　power　of　the　test　is　also　presented　for　some　local　alternative　hypotheses.　The　test　is　easy　to　implement,　and　is　shown　by　simulations　powerful　even　for　small　sample　sizes.　A　real　data　example　with　the　Capital　Bikeshare　data　is　presented　for　illustration.