An important task of the photon beam diagnostics at the European XFEL is providing reliable tools for measurements aiming at the search for and fine tuning of the FEL creating SASE process. Radiation detectors based on micro channel plates (MCP) will be use at the European XFEL. Detectors operate in a wide dynamic range from the level of spontaneous emission to the saturation level (between a few nJ and 25 mJ), and in a wide wavelength range from 0.05 nm to 0.4 nm for SASE1 and SASE2, and from 0.4 nm to 4.43 nm for SASE3. Photon pulse energies are measured by MCP with anode and with photodiode. The photon beam image is measured by MCP imager with phosphor screen anode. Three MCP devices will be installed, one after each SASE undulator of the European XFEL (SASE1, SASE2, and SASE3). At present time MCP SASE1 and MCP SASE3 were installed in XFEL tunnel. Calibration and acceptance test experiments with MCP detectors and their electronic is under discussion.