Let
K be a number field of degree
n, and let
d_K be its discriminant. Then, under the Artin conjecture, the generalized Riemann hypothesis and a certain zero-density hypothesis, we show that the upper and lower bounds of the logarithmic derivatives of Artin
L-functions attached to
K at
s=1 are
\log \log |d_K| and
-(n-1) \log \log |d_K|, respectively. Unconditionally, we show that there are infinitely many number fields with the extreme logarithmic derivatives; they are families of number fields whose Galois closures have the Galois group
C_n for
n=2,3,4,6,
D_n for
n=3,4,5,
S_4 or
A_5.