Exhibit 99.1

Perfect World Announces Shareholder Approval of Merger Agreement

(Beijing China — July 28, 2015) — Perfect World Co., Ltd. (NASDAQ: PWRD) (“Perfect World” or the “Company”), a leading online game developer and operator based in China, today announced that, at an extraordinary general meeting held today, the Company’s shareholders voted in favor of the proposal to authorize and approve the previously announced agreement and plan of merger dated April 26, 2015 (the “Merger Agreement”), among the Company, Perfect Peony Holding Company Limited (“Parent”) and Perfect World Merger Company Limited (“Merger Sub”), pursuant to which, Merger Sub will be merged with and into the Company with the Company continuing as the surviving corporation and becoming a wholly owned subsidiary of Parent (the “Merger”), and the plan of merger required to be filed with the Registrar of Companies of the Cayman Islands (the “Plan of Merger”) and the transactions contemplated thereby, including the Merger.

Approximately 98.0% of the total votes voted in person or by proxy at today’s meeting were in favor of the proposal to authorize and approve the Merger Agreement, the Plan of Merger and the transactions contemplated thereby, including the Merger.

Completion of the Merger is subject to the satisfaction or waiver of the conditions set forth in the Merger Agreement. The Company will work with various other parties to the Merger Agreement to satisfy all other conditions precedent to the Merger set forth in the Merger Agreement and complete the Merger as quickly as possible. If and when completed, the Merger would result in the Company becoming a privately held company and its American depositary shares, each representing five class B ordinary shares of the Company, would no longer be listed on the NASDAQ Global Select Market.

About Perfect World Co., Ltd. (http://www.pwrd.com)

Perfect World Co., Ltd. (NASDAQ: PWRD) is a leading online game developer and operator based in China. Perfect World primarily develops online games based on proprietary game engines and game development platforms. Perfect World’s strong technology and creative game design capabilities, combined with extensive knowledge and experiences in the online game market, enable it to frequently and promptly introduce popular games designed to cater changing customer preferences and market trends. Perfect World’s current portfolio of self-developed online games includes client-based online PC games: “Perfect World,” “Legend of Martial Arts,” “Perfect World II,” “Zhu Xian,” “Chi Bi,” “Hot Dance Party,” “Pocketpet Journey West,” “Battle of the Immortals,” “Fantasy Zhu Xian,” “Forsaken World,” “Empire of the Immortals,” “Return of the Condor Heroes,” “Saint Seiya Online,” “Swordsman Online,” “Holy King” and “Legend of the Condor Heroes;” and a number of web games and mobile games, such as “Return of the Condor Heroes,” “Forsaken World,” “CrossGate Mobile,” “Forever Mars,” “Dawn after Dark,” “Swordsman Mobile” and “Saint Seiya Mobile.”

Perfect World has also obtained exclusive rights to operate “DOTA2” in mainland China. While a majority of the revenues are generated in China, Perfect World operates its games in North America, Europe, Japan, Korea and Southeast Asia through its own subsidiaries. Perfect World’s games have also been licensed to leading game operators in a number of countries and regions in Asia, Latin America, and the Russian Federation and other Russian speaking territories. Perfect World intends to continue to explore new and innovative business models and is committed to maximizing shareholder value over time.

Safe Harbor Statements

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and as defined in the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as “if,” “will,” “expected,” and similar statements. Forward-looking statements involve inherent risks, uncertainties and assumptions. Risks, uncertainties and assumptions include: the possibility that debt financing may not be available; the possibility that various closing conditions for the transaction may not be satisfied or waived; and other risks and uncertainties discussed in the Schedule 13E-3 transaction statement, the proxy statement and other documents filed with the U.S. Securities Exchange Commission by the Company. These forward-looking statements reflect the Company’s expectations as of the date of this press release. You should not rely upon these forward-looking statements as predictions of future events. The Company does not undertake any obligation to update any forward-looking statement, except as required under applicable law.

For further information, please contact

Perfect World Co., Ltd.

Vivien Wang — Vice President, Capital Market & Corporate Communications

Tel: +86-10-5780-5700

Fax: +86-10-5780-5713

Email: ir@pwrd.com

http://www.pwrd.com

Christensen Investor Relations

Patty Bruner

Tel: +1-480-614-3036

Fax: +1-480-614-3033

Email: pbruner@christensenir.com

Jung Chang

Tel: +852-2117-0861

Fax: +852-2117-0869

Email: jchang@christensenir.com

Perfect World Co., Ltd. 6-K