The invention discloses a method for estimating a storage battery joint state via obtained off line data. The method is based on the relationship of the capacity S with respect to the temperature T S= p(T), the relation of the Coulomb coefficient k with respect to the temperature T = q(T), and the ratio of the change of the capacity S with the temperature T r = p(T)/S0 = w (T); SOC is calculatedvia a constant current charging voltage slope curve and SOC corresponding characteristic points D1 to D4 during battery charging processes; SOC is calculated according to a correspondence relationshipSOC=s(OCV,T) between OCV and the SOC and the temperature with SOC being in a range of 0 to AC and a range of AD to 100% when batteries are not in operation. This method can provide necessary data support for a state joint estimation algorithm and provide multiple explicit characteristic values for state estimation, accuracy of state estimation can be improved and a calculation amount of estimation can be reduced.