With the outbreak of environmental problems such as scarcity of resources and frequent occurrences of extreme weather for nearly a century, there is growing awareness of the importance of sustainable development. Although urbanisation, the irreversible process, has a few negative impacts on our living environment, it is undoubtedly that it has brought a whole new era of human production and living patterns. Therefore, to meet the developmental needs of future generations, sustainable urbanisation should be taken as the development policy of contemporary cities. This dissertation aims to answer the questions of whether the pace of urbanisation and sustainable development is consistent and to what extent in London, by evaluating the stage of urbanisation and the degree of sustainable development of London city through measurements of the urbanisation rate and the overall score of sustainability based on hierarchical analysis and an indicator-based system. The consistency between the urbanisation rate and the sustainability degree is also evaluated based on the elasticity coefficient. According to the results, it can be concluded that during 2011-2019, London's level. Also, in addition to specific years like 2015 and 2016, London has a relatively high degree of sustainability. Combined together, London’s urbanisation process has been proven to be sustainable. The value of the elasticity coefficient of sustainable urbanisation in 2011-2013, 2016-2017 and 2018-2019 are relatively high, presenting a better sustainability performance. It is likely triggered by the 2012 London Summer Olympic Games, the implementation of the London Plan 2016 and the Mayor’s Transport Strategy 2018. However, the local authorities should still focus on works like alleviating the gap between the rich and the poor, improving the efficiency of housing use, improving the traffic environment, etc., to achieve a higher level of sustainability.