Acts 1:13 says God will judge the world by Jesus Christ, the One He has ordained. Judgment of the righteous and unrighteous has been committed into the hand of Jesus Christ by God the Father. (John 5:22) Psalm 96:13 speaks of the Lord coming to judge the earth. (Jude 14,15)
The Bible speaks of five Judgments. They are
The Judgment Seat of Christ is the judgment of the works of the saints to build the kingdom of God. (2 Corinthians 5:10; Romans 4:17) This Judgment takes place at the Appearing. The saints' sins were judged at the cross. While on earth, saints are to judge themselves to be sure they are living and operating by God's will and word. (1 Corinthians 11:31,32) Failure to judge one's self can result in Judgment by God. (1 Peter 4:12-19) Saints should live so that they will not be ashamed at the Appearing. (1 John 2:28)
The Judgment of the Living Nations will take place when Jesus comes in glory. This is Jesus' Second Coming, when His feet will touch the Mount of Olives. (Zechariah 14:4; Acts 1:11) The nations that are judged are those that dealt with Israel during the Great Tribulation.
The Great White Throne Judgment is the judgment of the wicked dead. They will be judged out of the books for their works. (Revelation 20:11-15) Acts 17:31 says God will judge the world in righteousness by the Man He has ordained. God ordained Jesus Christ to be the Savior of the world. (John 14:6; Acts 2:36; 4:9-12; 10:36,43) Since the wicked dead are persons who did not receive Jesus Christ as their personal Savior and Lord during their lifetime, the work they will be judged for will be not making Jesus Lord of their lives. (John 3:18)
The Judgment of Israel will take place at the end of the Great Tribulation. (Ezekiel 20:33-44; Psalm 50:16-22)
The Judgment of Angels will be by believers. (1 Corinthians 6:3)