Consider a compact symplectic sub-orbifold groupoid S of a compact symplectic orbifold groupoid(X,ω).Let(X)a be the weight-a blowup of X along S,and Da = PNa be the exceptional divisor,where N is the normal bundle of S in X.In this paper we show that the absolute orbifold Gromov-Witten theory of(X)a can be effectively and uniquely reconstructed from the absolute orbifold Gromov-Witten theories of X,S and Da,the natural restriction homomorphism H*CR(X)→ H*CR(S)and the first Chern class of the tautological line bundle over Da.To achieve this we first prove similar results for the relative orbifold Gromov-Witten theories of((X)a | Da)and((N)a| Da).As applications of these results,we prove an orbifold version of a conjecture of Maulik and Pandharipande(Topology,2006)on the Gromov-Witten theory of blowups along complete intersections,a conjecture on the Gromov-Witten theory of root constructions and a conjecture on the Leray-Hirsch result for the orbifold Gromov-Witten theory of Tseng and You(J Pure Appl Algebra,2016).