Liveness and safeness are important behavioral properties of nets (systems).Many powerful results have been derived for some subclasses of Place/Transition nets (systems).The aim of this paper is to draw a general perspective of the liveness and safeness for a subclass with Extended Free Choice net-like underlying graph but allowing weights:Weighted Extended Free Choice nets (WEFC nets).First,a brief and intuitive proof of liveness equivalent condition for WEFC nets is given.Then,for safe nets,a sufficient and necessary condition is presented.