Standard Models tests and searches with photons at the LHC

We report on the sensitivity of the LHC experiments to the Standard Model predictions for $Wgamma$ and $Zgamma$ productions in $pp$ collisions with final states containing electrons, muons and photons. The studies use detector simulation data at $sqrt{s}=14$ TeV including calibration and alignment corrections. The results show that the cross-section measurements of $Wgamma$, and $Zgamma$ can be established with significance better than 5 sigma for the first 0.1 fb$^{-1}$ of integrated luminosity. The sensitivities to anomalous triple gauge boson couplings is also estimated. The measurements can be significantly improved with 1 fb$^{-1}$ of data over the results from the Tevatron.