Exhibit 12.2  Certification by the Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002  Date: April 20, 2012  PART III By: Name: Shu Yeh Title:  Chief Financial Officer 1. I have reviewed this annual report on Form 20-F of Chunghwa Telecom Co., Ltd.;  2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact  necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading  with respect to the period covered by this report;  3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in  all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods  presented in this report;  4. The company’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and  procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as  defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and have:  (a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed  under our supervision, to ensure that material information relating to the company, including its consolidated subsidiaries,  is made known to us by others within those entities, particularly during the period in which this report is being prepared;  (b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be  designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the  preparation of financial statements for external purposes in accordance with generally accepted accounting principles;  (c) Evaluated the effectiveness of the company’s disclosure controls and procedures and presented in this report our  conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this  report based on such evaluation; and  (d) Disclosed in this report any change in the company’s internal control over financial reporting that occurred during the  period covered by the annual report that has materially affected, or is reasonably likely to materially affect, the company’s  internal control over financial reporting; and  5. The company’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over  financial reporting, to the company’s auditors and the audit committee of the company’s board of directors (or persons  performing the equivalent functions):  (a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting  which are reasonably likely to adversely affect the company’s ability to record, process, summarize and report financial  information; and  (b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the  company’s internal control over financial reporting.  I, Shu Yeh, certify that: 