In this article, we study symmetric designs admitting flag-transitive,
point-imprimitive almost simple automorphism groups with socle sporadic simple
groups. As a corollary, we present a classification of symmetric designs
admitting flag-transitive automorphism group whose socle is a sporadic simple
group, and in conclusion, there are exactly seven such designs, one of which
admits a point-imprimitive automorphism group and the remaining are
point-primitive