A base station clock apparatus, comprising: a first-standard clock module for a radio service according to a first standard, configured to generate a first frequency synchronization clock signal, a first phase synchronization signal, and a first system clock signal according to a first external clock signal; and a second-standard clock module for a radio service according to a second standard that is different from the first standard, configured to receive the first frequency synchronization clock signal and the first phase synchronization signal from the first-standard clock module, and generate a second system clock signal; wherein the first-standard clock module comprises: a first software phase-locked loop, configured to receive the first external clock signal and generate the first frequency synchronization clock signal according to the first external clock signal; and a first hardware phase-locked loop, configured to receive the first frequency synchronization clock signal from the first software phase-locked loop and generate the first phase synchronization signal and the first system clock signal, such that the first system clock signal comprises a frequency of the first frequency synchronization clock signal and a phase of the first phase synchronization signal, and the second-standard clock module comprises: a second hardware phase-locked loop, configured to receive the first frequency synchronization clock signal from the first software phase-locked loop and the first phase synchronization signal from the first hardware phase-locked loop, and generate the second system clock signal, such that the second system clock signal comprises the frequency of the first frequency synchronization clock signal and the phase of the first phase synchronization signal. a first-standard clock module for a radio service according to a first standard, configured to generate a first frequency synchronization clock signal, a first phase synchronization signal, and a first system clock signal according to a first external clock signal; and a second-standard clock module for a radio service according to a second standard that is different from the first standard, configured to receive the first frequency synchronization clock signal and the first phase synchronization signal from the first-standard clock module, and generate a second system clock signal; wherein the first-standard clock module comprises: a first software phase-locked loop, configured to receive the first external clock signal and generate the first frequency synchronization clock signal according to the first external clock signal; and a first hardware phase-locked loop, configured to receive the first frequency synchronization clock signal from the first software phase-locked loop and generate the first phase synchronization signal and the first system clock signal, such that the first system clock signal comprises a frequency of the first frequency synchronization clock signal and a phase of the first phase synchronization signal, and the second-standard clock module comprises: a second hardware phase-locked loop, configured to receive the first frequency synchronization clock signal from the first software phase-locked loop and the first phase synchronization signal from the first hardware phase-locked loop, and generate the second system clock signal, such that the second system clock signal comprises the frequency of the first frequency synchronization clock signal and the phase of the first phase synchronization signal. a first software phase-locked loop, configured to receive the first external clock signal and generate the first frequency synchronization clock signal according to the first external clock signal; and a first hardware phase-locked loop, configured to receive the first frequency synchronization clock signal from the first software phase-locked loop and generate the first phase synchronization signal and the first system clock signal, such that the first system clock signal comprises a frequency of the first frequency synchronization clock signal and a phase of the first phase synchronization signal, and the second-standard clock module comprises: a second hardware phase-locked loop, configured to receive the first frequency synchronization clock signal from the first software phase-locked loop and the first phase synchronization signal from the first hardware phase-locked loop, and generate the second system clock signal, such that the second system clock signal comprises the frequency of the first frequency synchronization clock signal and the phase of the first phase synchronization signal.