The invention discloses an evoked potential recorder based on time characteristic indicators, which can carry out the computation and the function indicator measurement based on the following functional relation: L-Lmin=ae-bx or lg(L-Lmin)=-Bx+A, wherein L is response delay of a nervous system to a certain frequency simulating signal, x is logarithm of instantaneous strength of the simulating signal or constant coefficient of an increasing function; P(t) is the instantaneous strength; and Lmin, a and b, A(A=lga) and B(B=b/ln10), and K and T are constants relevant to the time response characteristics of the nervous system. Lmin is the shortest delay, T is a time conversion coefficient, K is a time (sound-electricity) conversion index, and the Lmin, the T and the K can respectively reflect various physiological functions and changes thereof of transfer characteristics of nerve fibers and synapses of hair cells, mechanical transfer characteristics of sound, sensibility of auditory center system nerve cells, sound-electricity conversion characteristics and the like.