Ⅰ. Introduction
ㅇTo support the implementation of the Second Alien Species Management Plan (2019o2023) and the establishment of the Fifth National Biodiversity Strategy (Management of inflow attention species and alien species),
ㅇA plan is proposed to improve the existing alien species management system after analyzing the current status of the influx of and damage from alien species and forecasting future trends, analyzing the internal and external alien species management issues and changes in conditions, benchmarking successful alien species management systems and deriving implications from them, and examining the existing alien species management systems and analyzing their limitations.

Ⅱ. Current Status and Prospects for the Influx of Alien Species and the Resulting Damage
ㅇAs of 2020, 2,167 alien species were confirmed (an increase of 142% compared with that in 2009) to be spreading throughout the country with robust growth, reproduction, migration, adaptation, and survival, with their habitat expanding even to highlands and islands.
ㅇThe inherent characteristics, habits, and activities of alien species have a negative impact on the environment/ecology (competition for food and space, inhibition of growth, disruptions to ecosystems, reduction in biodiversity), economy/society (inhibited ripening and fruiting of agricultural, forestry, and marine products; pest and diseases; destruction of waterways, water banks, and embankments), and health (disease and illness, respiratory disorders and disorders of consciousness, and death).
ㅇAn analysis of media reports (2018o2