This work is devoted to the investigation of transport and optical properties of liquid aluminum in the two-temperature case. At first optical properties, static electrical and thermal conductivities were obtained in the ab initio calculation. The ab initio calculation is based on the quantum molecular dynamics, density functional theory and the Kubo-Greenwood formula. The semiempirical approximation was constructed based on the results of the ab initio caculation. The approximation yields the dependences σ 1DC ∝ 1/T 0.25 i and K ∝ T e /T 0.25 i for the static electrical conductivity and thermal conductivity, respectively. The approximation is valid for liquid aluminum at ρ = 2.70 g/cm 3 , 3 kK ≤ T i ≤ T e ≤ 20 kK. Our results are well described by the Drude model with the effective relaxation time τ ∝ T −0.25 i . We have compared our results with a number of other models. They are all reduced in the low-temperature limit to the Drude model with different expressions for the relaxation time τ . Our results are not consistent with the models in which τ ∝ T −1 i and support the models which use the expressions with the slower decrease of the relaxation time.