Magnetic reconnection is a fundamental process in plasma, converting magnetic en-ergy to particle energy. In the Earths magnetotail, the process develops on a largerange of scales affecting global magnetospheric dynamics. We study magnetotail recon-nection by using observations from in situ and remote sensing in order to understandthe development of reconnection in time and space on different phases of its evolution.Reconnection in the near-Earth magnetotail operates under conditions where astrong dipole field exists Earthward of the reconnection site, the X-line. Quantitativeanalysis of the temporal evolution of the X-line from in situ observations showed thatin such an asymmetric global magnetic configuration, the X-line retreats away from theEarth due to the pressure gradient force. We also found that the X-line speed is relatedwith the reconnection outflow speed and the reconnection rate, which affects changes ofthe global magnetic configuration.The analysis of in situ data revealed a frequent occurrence of multiple reconnection.The temporal evolution of multiple reconnection involves dynamical interaction of theX-lines. Between the X-lines, collision of the counter-streaming reconnection flows leadsto the formation of a thin boundary which undergoes compression associated with strongwave activity on kinetic scales.By applying a three dimensional unsteady Petschek model to remote observationsof a transient reconnection flow, we estimated the reconnected magnetic flux and thelocation of the reconnection site. The estimates are in good agreement with the measuredtemporal and spatial evolution of the particular substorm, suggesting the applicabilityof the unsteady Petschek model for the remote sensing of the X-line.The presented research provides new knowledge of the temporal evolution and spatialcharacteristics of magnetotail reconnection, including dynamics of multiple reconnectionand interrelation between the X-line motion and the reconnection inflow speed. Theresults and elaborated method of remote sensing might be applicable in other similarreconnection environments, e.g., at the Sun and the magnetotails of other planets.