Let (A,β,β,0) be an MV-algebra, (A,β,0) be the associated
commutative semigroup, and I be an ideal of A. Define the ideal-based
zero-divisor graph ΞIβ(A) of A with respect to I to be a simple
graph with the set of vertices V(ΞIβ(A))={xβA\IΒ β£Β (βΒ yβA\I)Β xβyβI}, and two distinct vertices x
and y are joined by an edge if and only if xβyβI.
We prove that ΞIβ(A) is connected and its diameter is less than or
equal to 3. Also, some relationship between the diameter (the girth) of
ΞIβ(A) and the diameter (the girth) of the zero-divisor graph of A/I
are investigated. And using the girth of zero-divisor graphs (resp. ideal-based
zero-divisor graphs) of MV-algebras, we classify all MV-algebras into
2Β (resp. 3) types