By analyzing the large-angle Bhabha scattering events e+e → (γ)e+e and diphoton events e+e-→ (γ)γγ for the data sets collected at center-of-mass (c.m.) energies between 2.2324 and 4.5900 GeV (131 energy points in total) with the upgraded Beijing Spectrometer (BESIII) at the Beijing Electron-Positron Collider (BEPCII),the integrated luminosities have been measured at the different c.m.energies,individually.The results are important inputs for the R value and J/Ψ resonance parameter measurements.
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